Prevalência e fatores associados a não inscrição para transplante renal / Prevalence and factors associated with non-enrollment for kidney transplant / Prevalencia y factores asociados a la no inscripción para un trasplante renal

Resumo: Este estudo avaliou a prevalência e os fatores associados a não procura por transplante renal entre pacientes em diálise crônica na Região Metropolitana de Fortaleza, Ceará, Brasil. Foram excluídos os pacientes sem condições clínicas e aqueles em avaliação pré-transplante renal. Um questionário semiestruturado foi aplicado, incluindo opções para a pergunta "Qual o principal motivo pelo qual o senhor/senhora não está inscrito(a) para o transplante renal?". A prevalência de pacientes considerados aptos, mas não inscritos e nem em avaliação pré-transplante renal foi de 50,7%. As principais causas foram: receio de insucesso/perda do enxerto (32,5%), dificuldade de transporte e acesso aos exames (20,9%) e problemas pessoais ou familiares temporários (13,7%). Em análise múltipla, as variáveis associadas a risco de receio do insucesso/perda do enxerto foram: sexo feminino (OR = 1,763; IC95%: 1,224-2,540) e doença renal dialítica (DRC 5-D) por hipertensão (OR = 1,732; IC95%: 1,178-2,547), tendo a renda mensal (salários mínimos) uma associação de proteção (OR = 0,882; IC95%: 0,785-0,991). O tempo em diálise (meses) foi um fator de risco para a dificuldade de transporte e acesso aos exames (OR = 1,004; IC95%: 1,001-1,007) e o sexo feminino apresentou uma associação de proteção (OR = 0,576; IC95%: 0,368-0,901). Esses resultados mostram elevada prevalência de pacientes em diálise fora de lista para transplante renal. As principais causas são reflexo da desinformação e falta de acesso. Sexo feminino, baixa renda e DRC 5-D por hipertensão foram os fatores de risco para a não procura por transplante renal por receio de perda do enxerto, reflexo da carência de informações sobre a modalidade. Sexo masculino e maior tempo em diálise foram os fatores de risco para a dificuldade de acesso à terapia.

Abstract: This study evaluated the prevalence and factors associated with lack of enrollment for kidney transplant among patients in chronic dialysis in Greater Metropolitan Fortaleza, Ceará, Brazil. The sample excluded patients with insufficient clinical status and those already in pre-kidney transplant evaluation. A semi-structured questionnaire was applied, including options for the question, "What is the main reason why you are not enrolled for kidney transplant?" Prevalence of patients considered fit but not enrolled or in pre- kidney transplant evaluation was 50.7%. The main reasons were fear of failure/loss of grafting (32.5%), difficulty with transportation or access to tests (20.9%), and temporary personal or family problems (13.7%). In the multivariate analysis, the variables associated with fear of failure or loss of graft were female sex (OR = 1.763; 95%CI: 1.224-2.540) and end-stage renal disease (ESRD) due to hypertension (OR = 1.732; 95%CI: 1.178-2.547), while monthly income (number of minimum wages) showed a protective association (OR = 0.882; 95%CI: 0.785-0.991). Time on dialysis (months) was a risk factor for difficulty with transportation and access to tests (OR = 1.004; 95%CI: 1.001-1.007), and female sex showed a protective association (OR = 0.576; 95%CI: 0.368-0.901). These results show high prevalence of patients in dialysis not enrolled on the kidney transplant waitlist. The main causes were lack of information and lack of access. Female sex, low income, and ESRD due to hypertension were risk factors for lack of enrollment on the kidney transplant waitlist due to fear of loss of graft, resulting from lack of information on this treatment modality. Male sex and longer time on dialysis were risk factors for difficulty in access to kidney transplant.

Resumen: Este estudio evalúo la prevalencia y los factores asociados a la no búsqueda de un trasplante renal entre pacientes con diálisis crónica en la Región Metropolitana de Fortaleza, Ceará, Brasil. Se excluyeron a pacientes sin condiciones clínicas y aquellos en evaluación pre-trasplante renal . Se aplicó un cuestionario semiestructurado, incluyendo opciones a la pregunta "¿cuál es el principal motivo por el cual usted no está inscrito(a) para un trasplante renal?" La prevalencia de pacientes considerados aptos, pero no inscritos y ni en evaluación pre-trasplante renal fue de un 50,7%. Las principales causas fueron: recelo al fracaso/pérdida del injerto (32,5%), dificultad de transporte y acceso a los exámenes (20,9%), así como problemas personales o familiares temporales (13,7%). En el análisis múltiple, las variables asociadas al riesgo del recelo al fracaso/pérdida del injerto fueron de sexo femenino (OR = 1,763; IC95%: 1,224-2,540) y enfermedad renal dialítica (DRC 5-D) por hipertensión (OR = 1,732; IC95%: 1,178-2,547), teniendo la renta mensual (salarios mínimos) una asociación de protección (OR = 0,882; IC95%: 0,785-0,991). El tiempo en diálisis (meses) fue un factor de riesgo para la dificultad en el transporte y acceso a los exámenes (OR = 1,004; IC95%: 1,001-1,007), y el sexo femenino tuvo una asociación de protección (OR = 0,576; IC95%: 0,368-0,901). Estos resultados muestran la elevada prevalencia de pacientes en diálisis fuera de la lista para transplante renal. Las principales causas son reflejo de la desinformación y falta de acceso. Sexo femenino, baja renta y DRC 5-D por hipertensión fueron factores de riesgo para la no búsqueda de trasplante renal por recelo a la pérdida del injerto, reflejo de la carencia de información sobre la modalidad. Sexo masculino y mayor tiempo en diálisis fueron factores de riesgo para la dificultad de acceso a la terapia. izará la atención a las vulnerabilidades individuales desde la perspectiva de la salud integral.

Demographics and clinical features of elderly patients undergoing regular dialysis in Brazil

An increasing number of elderly people in renal support is expected in the coming years. The objective of this study was to report the clinical and socio-demographic data of end-stage renal disease (ESRD) adult patients undergoing regular dialysis treatment comparing elderly (≥65 years old) and non-elderly subjects using data from the Brazilian Dialysis Registry database. The regional distribution of the sample was Southeast (48.8%), South (33.7), Northeast (13.1%), Midwest (5.1%), and North (0.1%). A total of 18,030 patients were included in the analysis with elderly patients accounting for 29.5% of the sample. The elderly patients were predominantly male, white, retired, and literate. Elderly ESRD patients had a slightly higher frequency of undernourishment and a lower frequency of obesity than the non-elderly adults. A higher frequency of elderly patients were from the South and Southeast regions. The dialysis treatment of patients from both groups was predominantly funded by the public system, but the percent of non-public funding was higher for the elderly group. The most used initial access in the elderly was the central venous catheter and hemodialysis was the main modality at the beginning of treatment (93.2%), as well as during maintenance therapy (91.8%). Advanced age was associated with greater use of central venous catheter in the first dialysis session. The survival of the elderly on dialysis was lower than that of the non-elderly early in the course of dialysis and this difference increased over time. This is yet the largest national epidemiological study of elderly people on chronic dialysis.

The influence of a doppler ultrasound in arteriovenous fistula for dialysis failure related to some risk factors / Influência da Ultrassonografia Doppler nas Falhas de Fístulas Arteriovenosas de Diálise Relacionada a Alguns Fatores de Risco

ABSTRACT Introduction: The increasing prevalence of chronic kidney disease has increased the demand for arteriovenous fistula (AVF) care. The objective of this study was to assess the relationship between some risk factors for AVF failure (advanced age, female sex, diabetes, obesity, central venous catheter, previous fistula, and hospitalization) and having a Doppler ultrasound performed preoperatively. Methods: A prospective study was performed with 228 dialysis patients from Imperatriz, Maranhão. Half of the sample was randomly selected to receive preoperative Doppler ultrasound and the other half did not, from the period of October 2016 to September 2018. Results: There were 53 total failures corresponding to 23.2% of our sample, which is almost double that of the patients in the clinical group. Considering the failures and risk factors associated with the overall sample, there was a statistically significant association between a central venous catheter on the same side of the AVF with P = 0.04 (Odds Ratio 1.24) and obesity with P = 0.05 (Odds Ratio 1.36), which was not repeated in the Doppler ultrasound group individually. There was no statistically significant difference between the Doppler group and clinical group with respect to the amount of days of previous AVF hospitalization and failure. Conclusions: We concluded that the reduction of failures with an introduction of the Doppler was statistically significant in the overall sample, but establishing a relationship between specific risk factors and failure was only possible with two of the risk factors in the study - obesity and central venous catheter on the same side of the AVF.

RESUMO Introdução: A crescente prevalência de doença renal crônica aumentou a demanda por confecção de fístula arteriovenosa (FAV). O objetivo do presente estudo foi avaliar a relação entre alguns fatores de risco para falha da FAV (idade avançada, sexo feminino, diabetes, obesidade, cateter venoso central, fístula prévia e hospitalização) e a realização de ultrassonografia Doppler no pré-operatório. Métodos: Estudo prospectivo com 228 pacientes em diálise em Imperatriz, MA. Metade da amostra foi randomizada para receber ultrassonografia Doppler no pré-operatório. A outra metade dos pacientes não foi submetido a exame ultrassonográfico. O estudo incluiu pacientes atendidos no período de outubro de 2016 a setembro de 2018. Resultados: Houve 53 falhas (23,2%) em nossa amostra, quase o dobro do número dos pacientes no grupo clínico. Considerando as falhas e os fatores de risco associados à amostra geral, houve associação estatisticamente significativa entre catéter venoso central do mesmo lado da FAV (P = 0,04; Razão de Chances: 1,24) e obesidade (P = 0,05; Razão de Chances: 1,36), o que não foi reproduzido no grupo de ultrassonografia Doppler individualmente. Não houve diferença estatisticamente significativa entre o grupo Doppler e o grupo clínico em relação à quantidade de dias de internação e falha da FAV. Conclusões: A redução de falhas com a introdução do Doppler foi estatisticamente significativa na amostra geral, mas só foi possível estabelecer uma relação entre fatores de risco específicos e falha em dois dos fatores estudados, obesidade e catéter venoso central no mesmo lado da FAV.

Transcultural adaptation of the Thirst Distress Scale (TDS) into Brazilian Portuguese and an analysis of the psychometric properties of the scale for patients on hemodialysis / Adaptação transcultural do instrumento Thirst Distress Scale (TDS) para o português brasileiro e propriedades psicométricas em pacientes em hemodiálise

Abstract Objective: To produce a transcultural adaptation of the Thirst Distress Scale (TDS) into Brazilian Portuguese and analyze the scale's psychometric properties for patients on hemodialysis (HD). Methods: The original scale was translated, back translated, and discussed with psychometric assessment experts. The final version was tested with 126 patients on HD and retested with 70 individuals from the original patient population. Cronbach's alpha was used to measure the scale's internal consistency. Reliability of thirst intensity evaluated via the visual analogue scale (VAS) was tested with Kappa statistic and the Bland-Altman plot. Reproducibility was assessed based on the intraclass correlation coefficient (ICC). Results: The wording of three items and the verb tenses of six had to be adjusted in the final version of the Brazilian Portuguese TDS. Comprehension of the scale by patients on HD was good, the scale's internal consistency was satisfactory (0.84; p<0.001), agreement with a visual analogue scale (VAS) was moderate (kappa=0.44; p<0.001), and reproducibility neared perfection (ICC=0.87; p<0.001). Conclusion: Our results showed that the Brazilian Portuguese version of the scale might be used reliably. The Brazilian Portuguese version of the TDS is a practical, affordable, accessible and well-accepted tool that has a lot to offer for the management of patients with HD.

Resumo Objetivo: Realizar a adaptação transcultural da escala Thirst Distress Scale (TDS) para o português brasileiro e estudar suas propriedades psicométricas em pacientes em hemodiálise (HD). Métodos: Foram realizadas traduções, retrotraduções, discussão com especialistas e avaliação psicométrica, com aplicação da versão final em 126 pacientes em HD e reteste em 70 pacientes da amostra inicial. A consistência interna do instrumento foi obtida pelo alfa de Cronbach. Para analisar a concordância com a intensidade de sede, avaliada pela Escala Visual Analógica (EVA), foi utilizado o teste Kappa e a estratégia gráfica de Bland-Altman. Para avaliar a reprodutibilidade, foi realizado teste de correlação intraclasse (CCI). Resultados: Para obtenção da versão final da escala TDS em português brasileiro, intitulada TDS-BR, foi necessária adaptação de vocabulário em três itens e mudança de tempo verbal em seis itens. Houve boa compreensão da escala pelos pacientes em HD, consistência interna satisfatória (0,84, p<0,001), concordância moderada com a Escala Visual Analógica (EVA) (kappa=0,44; p<0,001) e reprodutibilidade quase perfeita (CCI=0,87; p<0,001). Conclusão: Os resultados obtidos indicam a aplicabilidade e confiabilidade do instrumento na língua portuguesa (Brasil). A ferramenta, por ser de fácil compreensão e baixo custo, além de ter boa aceitação, pode ser um instrumento relevante no manejo da sede de pacientes em HD.

Chronic kidney disease is a main confounding factor for 25-vitamin D measurement / A doença renal crônica é um importante fator de confusão para a dosagem de 25-hidroxivitamina D

Abstract Background: Current guidelines recommend assessment of 25-vitamin D status in patients with chronic kidney disease (CKD). Although significant differences among assays have been described, the impact of CKD on this variability has never been tested. Methods: We tested the variability between two 25-vitamin D assays in patients with CKD (eGFR < 60 mL/min/1.73m2) who had consecutive 25-vitamin D measurements in 2015 (Assay 1 - Diasorin LIASON 25 TOTAL - D assay®) and 2016 (Assay 2 - Beckman Coulter Unicel Xl 800®). The cohort consisted of 791 adult patients (122 with normal renal function and 669 with CKD - 33, 30, and 37% in stages 3, 4, and 5 on dialysis, respectively). Results: Levels of 25-vitamin D were lower and the prevalence of hypovitaminosis D using assay 1 was higher than using assay 2 in patients with CKD, regardless of similar levels of calcium, phosphate, and parathyroid hormone. As kidney function decreased, the percentage of disagreement between the assays increased. Conclusion: There is a noteworthy variability between assays in patients with CKD such that the diagnosis of hypovitaminosis D is modified. The mechanism behind this result is still unclear and might be due to a possible interference in the analytical process. However, the clinical significance is unquestionable, as the supplementation of vitamin D can be erroneously prescribed to these patients.

Resumo Antecedentes: As diretrizes atuais recomendam a avaliação do estado da 25-hidroxivitamina D em pacientes com doença renal crônica (DRC). Embora significativas diferenças entre os ensaios tenham sido descritas, o impacto da nesta variabilidade DRC nunca foi testado. Métodos: Testamos a variabilidade entre dois ensaios de 25-hidroxivitamina D em pacientes com DRC (TFGe < 60 mL/min/1,73 m2) que realizaram medidas consecutivas de 25-hidroxivitamina D em 2015 (Ensaio 1 - Diasorin LIASON 25 TOTAL - D assay® ) e 2016 (Ensaio 2 - Beckman Coulter Unicel Xl 800®). A coorte consistiu de 791 pacientes adultos (122 com função renal normal e 669 com DRC - 33, 30 e 37% nos estágios 3, 4 e 5 em diálise, respectivamente). Resultados: Os níveis de 25-hidroxivitamina D foram menores e a prevalência de hipovitaminose D foi maior utilizando o ensaio 1 do que com o ensaio 2 em pacientes com DRC, independentemente dos níveis similares de cálcio, fosfato e paratormônio. Quando a função renal diminuiu, a porcentagem de discordância entre os ensaios aumentou. Conclusão: Existe uma notável variabilidade entre os ensaios em pacientes com DRC, de modo a modificar o diagnóstico de hipovitaminose D. O mecanismo por trás desse resultado ainda não está claro e pode ser devido a uma possível interferência no processo analítico. Entretanto, o significado clínico é inquestionável, pois a suplementação de vitamina D pode ser erroneamente prescrita a esses pacientes.

Emotional repercussions and quality of life in children and adolescents undergoing hemodialysis or after kidney transplantation / Repercussões emocionais e qualidade de vida das crianças e adolescentes em hemodiálise ou após transplante renal

ABSTRACT Objective: To investigate the emotional repercussions and quality of life (QOL) associated with end-stage kidney disease (ESKD) in children and adolescents undergoing hemodialysis or a kidney transplant (TX). Methods: We conducted a quantitative-qualitative study. 48 children and adolescents with ESKD were interviewed; half of them underwent hemodialysis treatment, and the other half had a kidney transplantation. Their respective 48 caregivers also participated in the study. The questionnaire involved both the Pediatric Quality of Life Inventory and a thematic story-drawing tool. An analysis of the QOL questionnaire's results was done by comparing the sum of points between groups and the theme-based story-drawing consisted of interpreting the data contained in the material using Freudian and Lacanian theories. Results: In the QOL questionnaires, the total score was higher in the transplanted patients and in their caregivers, suggesting a perception of better QOL after kidney transplantation. In the specific aspects of the questionnaire, physical capacity was considered superior by children who underwent transplants and their caregivers. There were no differences between the groups in the emotional, social and school aspects. However, the caregivers of the patients who had a transplant perceived a significant difference in QOL in the school aspect. In the thematic story-drawings, emotional suffering in the two analyzed groups was evidenced regardless of the treatment. Conclusions: Despite the questionnaire results suggesting that transplantation does improve some aspects of QOL, there were no differences observed between kidney replacement therapies regarding the emotional repercussion of chronic kidney disease.

RESUMO Objetivo: Investigar as repercussões emocionais e a qualidade de vida (QV) associadas à doença renal crônica em crianças e adolescentes submetidos à hemodiálise ou ao transplante renal. Métodos: Foram entrevistadas 48 crianças e adolescentes com doença renal crônica, metade dos quais submetidos ao tratamento hemodialítico, e a outra metade, ao transplante renal. Os 48 respectivos cuidadores também participaram da pesquisa. Utilizou-se o questionário de QV Pediatric Quality of Life Inventory e o instrumento de desenho-estória com tema. A análise dos resultados do questionário de QV foi feita pela somatória dos pontos e a dos desenhos-estórias com tema consistiu na interpretação dos dados do material, utilizando as teorias freudiana e lacaniana. Resultados: Nos questionários de QV, a pontuação total foi superior na opinião dos pacientes transplantados e seus cuidadores, indicando percepção de melhor QV após o transplante renal. Nos aspectos específicos, a capacidade física também foi considerada superior por esse grupo. Não houve diferenças entre os grupos de pacientes nos aspectos emocional, social e escolar, porém os cuidadores dos pacientes transplantados notaram diferença na QV no aspecto escolar. Nos desenhos-estórias com tema, observou-se que o sofrimento emocional foi evidenciado nos dois grupos estudados. Conclusões: Não foram percebidas diferenças entre as terapêuticas renais substitutivas quanto às repercussões emocionais da doença renal crônica. Por outro lado, verificou-se que o transplante melhora a QV no aspecto geral.

Chronic Kidney Disease

SUMMARY Chronic kidney disease is highly prevalent (10-13% of the population), irreversible, progressive, and associated with higher cardiovascular risk. Patients with this pathology remain asymptomatic most of the time, presenting the complications typical of renal dysfunction only in more advanced stages. Its treatment can be conservative (patients without indication for dialysis, usually those with glomerular filtration rate above 15 ml/minute) or replacement therapy (hemodialysis, peritoneal dialysis, and kidney transplantation). The objectives of the conservative treatment for chronic kidney disease are to slow down the progression of kidney dysfunction, treat complications (anemia, bone diseases, cardiovascular diseases), vaccination for hepatitis B, and preparation for kidney replacement therapy.

Unexpectedly High Prevalence of Low Alpha-Galactosidase A Enzyme Activity in Patients with Focal Segmental Glomerulosclerosis

OBJECTIVES: Fabry disease (FD) is a rare disease associated with sphingolipid accumulation. Sphingolipids are components of plasma membranes that are important in podocyte function and accumulate in various glomerular diseases such as focal segmental glomerulosclerosis (FSGS). Both FD and FSGS can cause podocyte damage and are classified as podocytopathies. In this respect, FD and FSGS share the same pathophysiologic pathways. Previous screening studies have shown that a significant proportion of end-stage renal disease (ESRD) patients receiving hemodialysis (HD) have unsuspected FD, and the prevalence of low alpha-galactosidase A (αGLA) enzyme activity in these patients is higher than that in the normal population. We aimed to compare αGLA enzyme activity in patients with biopsy-proven FSGS and ESRD receiving HD. METHODS: The records of 232 patients [62 FSGS (F/M: 33/29); 170 HD (M/F: 93/79)] were evaluated retrospectively. The screening was performed based on the αGLA enzyme activity on a dried blood spot, with the confirmation of plasma LysoGb3 levels, and the known GLA mutations were tested in patients with low enzyme activities. The two groups were compared using these parameters. RESULTS: The mean level of αGLA enzyme activity was found to be lower in FSGS patients than in the HD group (2.88±1.2 μmol/L/h versus 3.79±1.9 μmol/L/h, p<0.001). There was no significant relationship between the two groups with regard to the plasma LysoGb3 levels (2.2±1.22 ng/ml versus 1.7±0.66 ng/ml, p: 0.4). In the analysis of GLA mutations, a D313Y mutation [C(937G>T) in exon p] was found in one patient from the FSGS group. CONCLUSIONS: We found that αGAL activity in patients with FSGS is lower than that in patients undergoing HD. The low enzyme activity in patients with FSGS may be explained by considering the similar pathogenesis of FSGS and FD, which may also lead to sphingolipid deposition and podocyte injury.

Effectiveness of adherence to a renal health program in a health network in Peru / Efectividad de la adherencia a un programa de salud renal en una red sanitaria de Perú

ABSTRACT OBJECTIVE To evaluate the effectiveness of adherence to a multidisciplinary renal health program in reducing mortality and progression to hemodialysis. METHODS We used a database that included patient monitoring (2013-2017), dialysis admissions and all cause of mortality in Peru. Adherence to the program was established by meeting minimum visits during the first year of monitoring. The outcome of interest was hemodialysis admissions or all cause-mortality. Kaplan-Meier curves, Log-Rank test and competing survival analysis methods were used to estimate the differential risk between adherent and non-adherent patients. RESULTS A total of 20,354 participants was evaluated; 54.1% were male, 72.1 years old in average, 2.2 years average follow-up, and 15,279 (75.1%) belonged to the early stages (1 to 3a) of Chronic Kidney Disease. Adherence decreased the risk of renal replacement therapy in 41.0% (HR = 0.59, 95%CI 0.41-0.85) in the low-risk group and mortality in the high-risk group was 31.0% (HR = 0.69, 95%CI 0.57-0.83). CONCLUSIONS The multidisciplinary care strategy with standardized assessments by stage is effective in reducing admission to .0when the patient is identified in early stages and in reducing mortality in advanced stages.

RESUMEN OBJETIVO Evaluar la efectividad de la adherencia a un programa de salud renal en la reducción de mortalidad y progresión a hemodiálisis. MÉTODOS Utilizamos una base de datos que condensaba el seguimiento de los pacientes (2013-2017), los ingresos a diálisis de los mismos y la mortalidad por todas las causas en Perú. La adherencia al programa se estableció con el cumplimiento de visitas mínimas durante su primer año de seguimiento. La efectividad de la adherencia al programa se midió en términos de debut a hemodiálisis o muerte por todas las causas. Se utilizaron curvas de Kaplan-Meier, test de diferencias en la distribución (Log-Rank test) y métodos de análisis de supervivencia. Los análisis se realizaron utilizando R estudio 3.5.0 RESULTADOS Fueron evaluados 20.354 participantes, 54,1% varones, edad media de 72,1 años, con un seguimiento medio de 2,2 años; 15.279 (75.1%) tuvieron ERC en estadios tempranos (estadio 1 al 3a). La adherencia disminuyó en un 41,0% el riesgo de terapia de reemplazo renal (HR = 0,59; IC95% 0,41-0,85) en el grupo de bajo riesgo y en un 31,0% (HR = 0,69; IC95% 0,57-0,83) la mortalidad en el grupo de alto riesgo. CONCLUSIONES La estrategia de cuidado multidisciplinario con evaluaciones estandarizadas según estadio es efectiva en reducir el ingreso a terapia de reemplazo renal cuando se identifica al paciente en estadios tempranos y en reducir la mortalidad en estadios avanzados.

ANCA associated vasculitis: experience of a tertiary care referral center / Vasculite associada a ANCA: experiência de um centro de referência de atendimento terciário

ABSTRACT Background and objectives: Anti-neutrophil cytoplasmic autoantibodies (ANCA) associated vasculitis is a small vessel vasculitis with insufficient epidemiologic estimates in the United States. We aimed to determine demographic and clinical features of ANCA associated vasculitis patients presenting to a large tertiary care referral center in Upstate New York. Design, setting, participants, and measurements: A retrospective analysis of cases with pauci-immune GN on renal biopsy and clinical diagnosis of ANCA vasculitis presenting over 11 years was conducted. Outcomes of interest were: demographics, ANCA antibody positivity, patient and renal survival, and regional trends. Results: 986 biopsies were reviewed, 41 cases met the criteria for inclusion: 18 GPA, 19 MPA, and 4 double positive (anti-GBM disease plus ANCA vasculitis). Mean age at presentation was 52.4 years (SD 23.7), 23 (56%) were male and median creatinine was 2.6 mg/dL. The median patient follow up was 77 weeks (IQR 10 - 263 weeks), with a 3-month mortality rate of 5.7% and a 1-year estimated mortality rate of 12%. Thirteen patients required hemodialysis at the time of diagnosis; 7 patients came off dialysis, with median time to renal recovery of 4.86 weeks (IQR 1.57 - 23.85 weeks). C-ANCA positivity (p < 0.001) and C-ANCA plus PR3 antibody pairing (p = 0.005) was statistically significant in GPA versus MPA. P-ANCA positivity was observed in MPA versus GPA (p = 0.02) and double positive versus GPA (p = 0.002), with P-ANCA and MPO antibody pairing in MPA versus GPA (p = 0.044). Thirty-seven of the 41 cases were referred locally, 16 cases were from within a 15-mile radius of Albany, Schenectady, and Saratoga counties. Conclusions: ANCA vasculitis is associated with end stage renal disease and increased mortality. Our study suggests the possibility of higher regional incidence of pauci-immune GN in Upstate New York. Further studies should investigate the causes of clustering of cases to specific regions.

RESUMO Introdução e objetivos: A vasculite associada a anticorpos anticitoplasma de neutrófilo (ANCA) é uma vasculite de pequenos vasos com estimativas epidemiológicas insuficientes nos Estados Unidos. Nosso objetivo foi determinar características demográficas e clínicas de pacientes com vasculite associada à ANCA, apresentando-se a um grande centro de referência de atendimento terciário em Upstate New York. Formato, cenário, participantes e medidas: Foi realizada uma análise retrospectiva dos casos de GN pauci-imune em biópsias renais e diagnóstico clínico de vasculite ANCA por mais de 11 anos. Os resultados de interesse foram: dados demográficos, positividade de anticorpos ANCA, sobrevidas renal e de pacientes e tendências regionais. Resultados: 986 biópsias foram revisadas, 41 casos preencheram os critérios de inclusão: 18 GPA, 19 PAM, e 4 duplo-positivos (doença anti-MBG com vasculite ANCA). A média de idade na apresentação foi de 52,4 anos (DP 23,7), 23 (56%) eram do sexo masculino e mediana de creatinina de 2,6 mg/dL. O acompanhamento mediano dos pacientes foi de 77 semanas (IQR 10 - 263 semanas), com uma taxa de mortalidade de 3 meses de 5,7% e uma taxa de mortalidade estimada em 1 ano de 12%. Treze pacientes necessitaram de hemodiálise no momento do diagnóstico; 7 pacientes saíram da diálise, com tempo médio para recuperação renal de 4,86 semanas (IQR 1,57 - 23,85 semanas). A positividade para C-ANCA (p < 0,001) e o pareamento de anticorpos C-ANCA mais PR3 (p = 0,005) foram estatisticamente significantes em GPA versus PAM. A positividade de P-ANCA foi observada em PAM versus GPA (p = 0,02) e duplo positivo versus GPA (p = 0,002), com pareamento de anticorpos P-ANCA e MPO em PAM versus GPA (p = 0,044). Trinta e sete dos 41 casos foram encaminhados localmente, 16 casos foram de dentro de um raio de 15 milhas dos condados de Albany, Schenectady e Saratoga. Conclusões: A vasculite por ANCA está associada à doença renal terminal e aumento da mortalidade. Nosso estudo sugere a possibilidade de maior incidência regional de GN pauci-imune no norte do estado de Nova York. Novos estudos devem investigar as causas do acúmulo de casos em regiões específicas.

TpTe and TpTe/QT: novel markers to predict sudden cardiac death in ESRD? / TpTe e TpTe/QT: novos marcadores para prever morte súbita cardíaca na DRT?

ABSTRACT Introduction: Reliable markers to predict sudden cardiac death (SCD) in patients with end stage renal disease (ESRD) remain elusive, but echocardiogram (ECG) parameters may help stratify patients. Given their roles as markers for myocardial dispersion especially in high risk populations such as those with Brugada syndrome, we hypothesized that the Tpeak to Tend (TpTe) interval and TpTe/QT are independent risk factors for SCD in ESRD. Methods: Retrospective chart review was conducted on a cohort of patients with ESRD starting hemodialysis. Patients were US veterans who utilized the Veterans Affairs medical centers for health care. Average age of all participants was 66 years and the majority were males, consistent with a US veteran population. ECGs that were performed within 18 months of dialysis initiation were manually evaluated for TpTe and TpTe/QT. The primary outcomes were SCD and all-cause mortality, and these were assessed up to 5 years following dialysis initiation. Results: After exclusion criteria, 205 patients were identified, of whom 94 had a prolonged TpTe, and 61 had a prolonged TpTe/QT interval (not mutually exclusive). Overall mortality was 70.2% at 5 years and SCD was 15.2%. No significant difference was observed in the primary outcomes when examining TpTe (SCD: prolonged 16.0% vs. normal 14.4%, p=0.73; all-cause mortality: prolonged 55.3% vs. normal 47.7%, p=0.43). Likewise, no significant difference was found for TpTe/QT (SCD: prolonged 15.4% vs. normal 15.0%, p=0.51; all-cause mortality: prolonged 80.7% vs. normal 66.7%, p=0.39). Conclusions: In ESRD patients on hemodialysis, prolonged TpTe or TpTe/QT was not associated with a significant increase in SCD or all-cause mortality.

RESUMO Introdução: Marcadores confiáveis para predizer morte súbita cardíaca (MSC) em pacientes com doença renal terminal (DRT) permanecem elusivos, mas os parâmetros do ecocardiograma (ECG) podem ajudar a estratificar os pacientes. Devido a seus papéis como marcadores para a dispersão miocárdica, especialmente em populações de alto risco, como aquelas com síndrome de Brugada, nós hipotetizamos que o intervalo pico da onda T ao final da onda T (TpTe) e TpTe/QT são fatores de risco independentes para MSC na DRT. Métodos: Revisão retrospectiva do prontuário foi realizada em uma coorte de pacientes com DRT iniciando a hemodiálise. Os pacientes eram veteranos de guerra americanos que utilizavam os centros médicos do Veterans Affairs para atendimento médico. A idade média de todos os participantes foi de 66 anos e a maioria era do sexo masculino, consistente com uma população veterana dos EUA. ECGs que foram realizados dentro de 18 meses após o início da diálise, e foram avaliados manualmente para TpTe e TpTe/QT. Os desfechos primários foram MSC e mortalidade por todas as causas, e estes foram avaliados até 5 anos após o início da diálise. Resultados: Após o critério de exclusão, foram identificados 205 pacientes, dos quais 94 com TpTe prolongado e 61 com intervalo TpTe/QT prolongado (não mutuamente exclusivo). A mortalidade geral foi de 70,2% em 5 anos e a MSC foi de 15,2%. Nenhuma diferença significativa foi observada nos desfechos primários ao se avaliar o TpTe (MSC: prolongado 16,0% versus normal 14,4%, p = 0,73; mortalidade por todas as causas: prolongado 55,3% vs. normal 47,7%, p = 0,43). Da mesma forma, nenhuma diferença significativa foi encontrada para TpTe/QT (MSC: prolongado 15,4% vs. normal 15,0%, p = 0,51; mortalidade por todas as causas: prolongado 80,7% vs. normal 66,7%, p = 0,39). Conclusões: Em pacientes com insuficiência renal terminal em hemodiálise, TpTe ou TpTe/QT prolongados não foram associados a um aumento significativo da morte súbita ou mortalidade por todas as causas.

Demographic, clinical characteristics and cardiovascular disease burden in a Portuguese cohort of older chronic kidney disease patients / Dados demográficos, características clínicas e peso da doença cardiovascular em uma coorte portuguesa de pacientes idosos com doença renal crônica

ABSTRACT Introduction: Chronic kidney disease (CKD) is an independent risk factor for several unfavorable outcomes including cardiovascular disease (CVD), particularly in the elderly, who represent the most rapidly growing segment of the end-stage kidney disease (ESKD) population. Portugal has the highest European unadjusted incidence and prevalence rates of ESKD. In 2012, we started to follow a cohort of elderly CKD patients, we describe their baseline characteristics, risk profile, and cardiovascular disease burden. Methods: All CKD patients aged 65 years and older referred to our department during 2012 were enrolled. Baseline data included: demographic, CKD stage, medication, comorbid conditions. Estimated glomerular filtration rate (eGFR) was calculated by the CKD-EPI formula. Results: A total of 416 patients, 50% referred by primary care physicians, aged 77 ± 7 years, 52% male, with a median eGFR of 32 mL/min/1.73m2 participated in the study. Fifty percent had diabetes (DM), 85% dyslipidemia, 96% hypertension; 26% were current/former smokers, and 24% had a body mass index > 30 kg/m2. The prevalence of CVD was 62% and higher in stage 4-5 patients; in diabetics, it gradually increased with CKD progression (stage 3a < stage 3b < stage 4-5) (39, 58, 82%; p < 0.001). Conclusions: At baseline, our CKD elderly cohort had a higher burden of CVD. The prevalence of CVD was greater than in other European CKD cohorts. Lower level of eGFR was associated with a greater burden of CVD and was more pronounced in diabetics, highlighting the importance of strategically targeting cardiovascular risk reduction in these patients.

RESUMO Introdução: Doença renal crônica (DRC) é fator de risco independente para vários desfechos desfavoráveis, incluindo doença cardiovascular (DCV), particularmente em idosos, o segmento de crescimento mais rápido da população com doença renal terminal (DRT). Portugal tem a maior incidência europeia não-ajustada e a maior prevalência de DRT. Neste artigo caracterizamos uma coorte de idosos com DRC, referenciados para a nefrologia, com particular ênfase para o risco e carga de doença cardiovascular. Métodos: Foram incluídos todos os pacientes com DRC com 65 anos ou mais encaminhados ao nosso departamento em 2012. Os dados basais incluíram: demografia, estágio da DRC, medicação e comorbidades. A taxa de filtração glomerular (TFGe) foi calculada pela fórmula CKD-EPI. Resultados: Metade dos 416 pacientes incluídos foram encaminhados por médicos da atenção primária; sua idade era 77 ± 7 anos; 52% eram homens; a TFGe mediana era de 32 mL /min/1,73 m2. Metade tinha diabetes (DM), 85% dislipidemia, 96% hipertensão; 26% eram fumantes atuais/ antigos; 24% tinham índice de massa corporal > 30 kg/m2. A prevalência de DCV foi de 62%, sendo maior entre pacientes nos estágios 4-5; em diabéticos, aumentou gradualmente com a progressão da DRC (estágio 3a < estágio 3b < estágio 4-5) (39%, 58%, 82%; p < 0,001). Conclusões: A coorte de idosos com DRC apresentava inicialmente maior carga de DCV. A prevalência de DCV foi maior que em outras coortes europeias com DRC. Níveis menores de TFGe foram associados a carga maior de DCV e foram mais pronunciados entre diabéticos, destacando a importância de objetivar estrategicamente a redução do risco cardiovascular nesses pacientes.

Epidemiology and outcomes of anal abscess in patients on chronic dialysis: a 14-year retrospective study

OBJECTIVES: We conducted this retrospective study to elucidate the clinical presentation and outcomes of anal abscess in chronic dialysis patients. METHODS: We performed a chart review of patients who were hospitalized for anal abscess from Jan. 2002 to Dec. 2015. A total of 3,074 episodes of anal abscess were identified. Of these, 43 chronic dialysis patients with first-time anal abscess were enrolled. Patients were divided into a surgical group and a nonsurgical group according to the treatment received during hospitalization. The baseline characteristics, clinical findings, treatments and outcomes were obtained and analyzed. The endpoints of this study were in-hospital mortality, one-year mortality and one-year recurrence. RESULTS: Of the 43 patients, 27 (62.7%) received surgical treatment, and 16 (37.2%) received antibiotic treatment alone. There was no significant difference in age, sex, body mass index, smoking habits, comorbidities, or dialysis characteristics between the two groups. Perianal abscess was the most common type of anal abscess, and 39.5% of patients experienced fistula formation. Most patients had mixed aerobic and anaerobic flora. Our data demonstrate that there was no significant difference in hospital stay, one-year survival or recurrence rate between the surgical group and nonsurgical group. However, there was a trend toward better in-hospital survival in patients who received surgical treatment (p=0.082). CONCLUSION: In chronic dialysis patients with anal abscess, there was no statistically significant difference in clinical presentation and outcomes between the surgical and nonsurgical groups, although the surgical group had a trend of better in-hospital survival.

Análisis de aspectos relacionados con la equidad en salud y la insuficiencia renal crónica para el caso de la mujer en México / Healthcare equity and chronic renal failure in Mexico: an analysis for the case of women

INTRODUCCIÓN La insuficiencia renal crónica es una enfermedad que se encuentra en un estado de constante crecimiento. La discapacidad que genera esta enfermedad debe considerar efectos físicos y sociales, dada la falta de atención y a las condiciones socioeconómicas que la generan. Por lo tanto, el acceso a los servicios para tratar la insuficiencia renal crónica está condicionado a factores de tipo social y de tipo biológico. OBJETIVO Analizar el efecto de los componentes sociales en la insuficiencia renal crónica en un sector de la población de México que padece la enfermedad, en particular para el caso de la mujer. MÉTODOS Se aplicó el modelo lineal generalizado de Poisson, seleccionando las variables relacionadas con la equidad en la aplicación de los servicios de salud. Se tomaron datos estadísticos reportados en mujeres por el Instituto Nacional de Estadística y Geografía de México en el periodo 2009-2015. Las variables consideradas fueron grado de escolaridad, ocupación, acceso a la salud, región geográfica y zona habitable, así como le etapa de vida. RESULTADOS La mayor tasa de incidencia para la insuficiencia renal crónica corresponde a la mujer adulta intermedia, que trabaja en servicios informales excluidos legalmente de la cobertura institucional de salud, tiene baja escolaridad y vive en un área rural de la zona centro; mientras que la mujer adulta joven que vive en una metrópoli urbana de la zona norte presenta el perfil de menor incidencia. CONCLUSIONES Los determinantes económicos derivados de la actividad de las personas, así como la edad, el nivel educativo y el entorno en el que habitan, influyen tanto en el padecimiento de la enfermedad como en las posibilidades de enfrentarla con éxito.

INTRODUCTION Kidney chronic disease patients are being increasingly identified. The disability generated by this disease must consider physical and social effects given the lack of attention and the socioeconomic conditions that generate it. Therefore, access to services to treat kidney chronic disease is determined by social and biological factors. OBJECTIVE To analyze the effect of the social components on kidney chronic disease in a sector of the Mexican population that suffers from the disease, particularly in the case of women. METHODS The Poisson generalized linear model was applied, selecting the variables related to equity in the administration of health services. Statistical data reported by the National Institute of Statistics and Geography of Mexico in the period 2009-2015 in women was taken. The variables considered were the level of schooling, occupation, access to health, geographical region and habitable zone, as well as stage of life. RESULTS The highest incidence rate for kidney chronic disease is attributed to the intermediate adult woman, who works in informal services legally excluded from institutional health coverage, has low schooling and lives in a rural area of the Center zone, while the young adult woman that lives in an urban metropolis in the North zone presents lowest incidence profile. CONCLUSION The economic determinants derived from people's activities, as well as their age, the educational level and the environment in which they live influence both the acquisition of the disease and the possibilities of managing it successfully.

Associação entre o escore pediatric Risk, Injury, Failure, Loss and End Stage Renal Disease e mortalidade em unidade de terapia intensiva pediátrica: um estudo retrospectivo / Association between pediatric Risk, Injury, Failure, Loss and End Stage Renal Disease score and mortality in a pediatric intensive care unit: a retrospective study

RESUMO Objetivo: Avaliar a associação entre a presença de lesão renal aguda, por meio do escore pediatric Risk, Injury, Failure, Loss and End Stage Renal Disease, e mortalidade em unidade de terapia intensiva pediátrica. Métodos: Estudo de coorte retrospectivo que incluiu todas as crianças internadas em uma unidade de terapia intensiva pediátrica de um hospital de referência no Brasil, entre os meses de janeiro e dezembro de 2016. Os pacientes foram triados quanto à presença de lesão renal aguda por meio do escore pediatric Risk, Injury, Failure, Loss and End Stage Renal Disease. Elas foram subdivididas segundo os estádios risco, lesão e falência renal. Resultados: A amostra foi composta por 192 crianças, das quais 45,8% desenvolveram lesão renal aguda, tendo a identificação desta lesão ocorrido em até 72 horas após a admissão em 79,5% dos casos. Pacientes com lesão renal aguda apresentaram 3,74 mais chances de morrer (p = 0,01) em comparação às crianças do grupo controle. Pacientes com falência renal apresentaram mortalidade 8,56 vezes maior que a do restante da amostra (p < 0,001). As variáveis que apresentaram associação com os estádios de lesão renal aguda foram: uso de fármacos nefrotóxicos (p = 0,025), terapia de substituição renal (p < 0,001), uso de fármacos vasoativos (p < 0,001), escore Pediatric Risk of Mortality 2 (p = 0,023), sobrecarga de fluidos (p = 0,005), tempo de internação na unidade de terapia intensiva pediátrica (p = 0,001) e morte (p < 0,001). Conclusão: Neste estudo, o escore pediatric Risk, Injury, Failure, Loss and End Stage Renal Disease mostrou-se ferramenta útil para a identificação precoce de crianças com lesão renal aguda grave, mostrando associação com a mortalidade. Sugerimos seu uso rotineiro na admissão de pacientes à unidade de terapia intensiva pediátrica.

ABSTRACT Objective: To evaluate the association between acute kidney injury through the pediatric Risk, Injury, Failure, Loss and End Stage Renal Disease score and mortality in a pediatric intensive care unit. Methods: This retrospective cohort study assessed all children admitted to the pediatric intensive care unit of a reference hospital in Brazil from January to December 2016. Patients were screened for the presence of acute kidney injury through the pediatric Risk, Injury, Failure, Loss and End Stage Renal Disease score. Patients were subdivided into the stages of Risk, Injury and Kidney Failure. Results: The sample comprised 192 children, of whom 45.8% developed acute kidney injury, with 79.5% of the cases identified up to 72 hours after admission. Patients with acute kidney injury showed a 3.74 increase risk of death (p = 0.01) than the control group. Patients with kidney failure had a mortality rate that was 8.56 times greater than that of the remaining sample (p < 0.001). The variables that were associated with the stages of acute kidney injury were nephrotoxic drugs (p = 0.025), renal replacement therapy (p < 0.001), vasoactive drugs (p < 0.001), pediatric risk of mortality 2 score (p = 0.023), fluid overload (p = 0.005), pediatric intensive care unit length of stay (p = 0.001) and death (p < 0.001). Conclusion: In this study, the pediatric Risk, Injury, Failure, Loss and End Stage Renal Disease score proved to be a useful tool for the early identification of severely ill children with acute kidney injury, showing an association with mortality. We thus suggest its use for pediatric intensive care unit patient admission.

Restless legs syndrome in end-stage renal disease patients undergoing hemodialysis / Síndrome de Piernas Inquietas en enfermedad renal crónica terminal en hemodiálisis

ABSTRACT Restless legs syndrome (RLS) is a frequent complication of hemodialysis that has been associated with poor quality of life and increased risk for complications. Nevertheless, few studies regarding this entity exist in resource-limited settings. Objectives: To determine the prevalence of RLS among Mexican patients on hemodialysis; and compare these patients with a control group of the same population. Methods: We recruited 105 hemodialysis patients. Restless legs syndrome was diagnosed according to the updated criteria set out by the International RLS Study Group. We selected patients who did not meet the criteria, as controls. Results: We found an RLS prevalence of 18%. The RLS patients had a significantly higher prevalence of iron deficiency anemia and uremic pruritus. None of the patients reported RLS symptoms prior to hemodialysis initiation. Conclusions: Restless legs syndrome is common among Mexican patients on hemodialysis. Larger studies are required to address the impact of RLS in hemodialysis patients.

RESUMEN El síndrome de piernas inquietas (SPI) es una complicación de la hemodiálisis que se ha asociado con menor calidad de vida y riesgo aumentado de complicaciones. Sin embargo, existen pocos estudios acerca de esta entidad en escenarios de recursos limitados. Objetivos: Determinar la prevalencia de SPI en pacientes mexicanos en hemodiálisis, y comparar las características con un grupo control de la misma población. Métodos: Reclutamos 105 pacientes en hemodiálisis. El SPI se diagnosticó de acuerdo con los criterios actualizados del grupo de estudio internacional del síndrome de piernas inquietas. Seleccionamos a los pacientes que no cumplieron dichos criterios como controles. Resultados: Encontramos una prevalencia de SPI del 18%. Los pacientes con SPI tenían una prevalencia más alta de anemia ferropénica, y prurito urémico. Ninguno de los pacientes reportó síntomas de SPI previo a iniciar la hemodiálisis. Conclusiones: El SPI es frecuente en pacientes mexicanos en hemodiálisis; se requieren estudios más grandes para evaluar el impacto del síndrome en ésta población.

Prevalence and risk factors of mild chronic renal failure in HIV-infected patients: influence of female gender and antiretroviral therapy

ABSTRACT Background In people living with HIV, much is known about chronic kidney disease, defined as a glomerular filtration rate under 60 mL/min. However, there is scarce data about prevalence and risk factors for milder impairment (60-89 mL/min). Objective The present study aims to assess the influence of sex, antiretroviral therapy, and classical risk factors on the occurrence of mild decreased renal function in a large Spanish cohort of HIV-infected patients. Methods Cross-sectional, single center study, including all adult HIV-1-infected patients under antiretroviral treatment with at least two serum creatinine measures during 2014, describing the occurrence of and the risk factors for mildly decreased renal function (eGFR by CKD-EPI creatinine equation of 60-89 mL/min). Results Among the 4337 patients included, the prevalence rate of mildly reduced renal function was 25%. Independent risk factors for this outcome were age older than 50 years (OR 3.03, 95% CI 2.58-3.55), female sex (OR 1.23, 95% CI 1.02-1.48), baseline hypertension (OR 1.57, 95% CI 1.25-1.97) or dyslipidemia (OR 1.48, 95% CI 1.17-1.87), virologic suppression (OR 1.88, 95% CI 1.39-2.53), and exposure to tenofovir disoproxil-fumarate (OR 1.67, 95% CI 1.33-2.08) or ritonavir-boosted protease-inhibitors (OR 1.19, 95% CI 1.03-1.39). Conclusions Females and patients over 50 seem to be more vulnerable to renal impairment. Potentially modifiable risk factors and exposure to tenofovir disoproxil-fumarate or ritonavir-boosted protease-inhibitors are present even in earlier stages of chronic kidney dysfunction. It remains to be determined whether early interventions including antiretroviral therapy changes (tenofovir alafenamide, cobicistat) or improving comorbidities management will improve the course of chronic kidney disease.

Tendência e causa múltipla de óbito por insuficiência renal crônica em município da Amazônia brasileira / Trends and multiple causes of death due to chronic renal failure in a municipality in the Brazilian Amazon

Resumo O presente estudo buscou observar a tendência de mortalidade por insuficiência renal crônica (IRC) e verificar as causas básicas e associadas na capital do Acre, Amazônia brasileira. Para tanto, foi realizado um estudo ecológico com dados de óbitos por IRC do DATASUS ocorridos entre 1986 e 2012, em ambos os sexos de residentes em Rio Branco, Acre. Estimou-se a variação anual percentual (Estimated Annual Percentage Chance - EAPC) com a técnica de regressão log-linear de Poisson do programa Joinpoint. Os resultados demonstraram que as taxas de mortalidade ajustadas da IRC com correção variaram de 15,4 por 100.000 hab., em 1986, para 4,0 por 100.000 hab., em 2012. A EAPC foi de -3,5%, de 1986 a 2012. Os óbitos pela IRC apresentaram como causas associadas às doenças respiratórias, pneumonia e edema pulmonar, às septicemias e aos sinais e sintomas mal definidos. Quando analisada a IRC como causa associada, as principais causas básicas do óbito foram as doenças hipertensivas e o diabetes. Assim, houve redução da mortalidade por insuficiência renal crônica como causa básica no período observado, contudo medidas de prevenção e assistência em saúde devem ser mantidas.

Abstract This study examined the mortality trend due to chronic renal failure (CRF) and verified the underlying and associated causes for this trend in the capital of the state of Acre in the Brazilian Amazon. This ecological study used data provided by DATASUS related to mortality due to CRF, which occurred between 1986 and 2012 for male and female residents of the city of Rio Branco, Acre, Brazil. The estimated annual percentage chance (EAPC) was calculated by using Poisson log-linear regression and utilizing the Joinpoint program. The results showed that the adjusted mortality rates due to CRF, with correction, ranged from 15.4 per 100,000 inhabitants in 1986 to 4.0 per 100,000 inhabitants in 2012. The EAPC was -3.5% from 1986- 2012. Deaths by CRF presented associated causes such as respiratory diseases, pneumonia and pulmonary edema, septicemias and poorly defined signs and symptoms. When CRF was analyzed as an associated cause of death, the main primary causes of death were hypertensive diseases and diabetes. Thus, there was a decrease in mortality due to CRF as an underlying cause during the period studied; however, preventive and heath care measures should be maintained.