The Effects of an Educational Intervention About Front-of-Package Labeling on Food and Beverage Selection Among Children and Their Caregivers: Protocol for a Randomized Controlled Trial.

BACKGROUND: Overweight and obesity pose a global public health challenge and have a multifactorial origin. One of these factors includes obesogenic environments, which promote ultraprocessed foods characterized by being high in calories, saturated fats, added sugars, and sodium. In Mexico, it has been estimated that 30% of the total energy consumed comes from processed foods. The Modification to the Official Mexican Standards introduces nutritional information through black octagonal seals that alert consumers about products with excessive amounts of some components for a better food selection in the population. However, the effects of warning labels on processed food selection and purchases among children remain unknown. OBJECTIVE: We aimed to evaluate the impact of a digital educational intervention focusing on front-of-package warning labels on the food selection and purchasing behavior of elementary schoolchildren and their caregivers. METHODS: Children from 4 elementary schools in Mexico City, 2 public and 2 private schools, will participate in a randomized controlled trial. The schools will be chosen by simple random sampling. Schools will be randomized into 2 groups: intervention and control. In the control group, the dyads (caregiver-schoolchildren) will receive general nutritional education, and in the intervention group, they will receive guidance on reading labels and raising awareness about the impact of consuming ultraprocessed products on health. The educational intervention will be conducted via a website. Baseline measurements will be taken for both groups at 3 and 6 months. All participants will have access to an online store through the website, allowing them to engage in exercises for selecting and purchasing food and beverages. In addition, other measures will include a brief 5-question exam to evaluate theoretical understanding, a 24-hour reminder, a survey on food habits and consumption, application of a food preference scale, anthropometric measurements, and recording of school lunch choices. RESULTS: Registration and funding were authorized in 2022, and we will begin data collection in September 2024. Recruitment has not yet taken place, but the status of data analysis and expected results will be published in April 2025. CONCLUSIONS: The study is expected to contribute to evaluating whether reinforcing front-of-package warning labels with education enhances its effects and makes them more sustainable. Conducting this study will allow us to propose whether or not it is necessary to develop new intervention strategies related to front-of-package labeling for a better understanding of the population, improved food choices, and better health outcomes. TRIAL REGISTRATION: ClinicalTrials.gov NCT06102473; https://clinicaltrials.gov/study/NCT06102473. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID): PRR1-10.2196/54783.

Cross-sectional evaluation of the association between greenness and cognitive performance in Mexican pre-pubertal boys.

BACKGROUND: Evidence shows that greenspace exposure benefits children's health and cognitive development. However, evidence assessing this association in young children in low- and middle-income economies is scarce. OBJECTIVE: To assess the association between exposure to greenness and cognitive performance in pre-pubertal boys living in Mexico City. METHODS: Cross-sectional study using data from 144 boys aged 6-11 years living in Mexico City in 2017 and enrolled in the "MetCog" study. Cognitive performance was evaluated through selected Wechsler Scale for Intelligence in Children Fourth Edition (WISC-IV) and Neuropsychological Assessment of Children (Evaluación Neuropsicológica Infantil, ENI) tests. Exposure to greenness was assessed through Normalised Difference Vegetation Index (NDVI) at 300, 500, 1500, 2000, and 3000 m buffer zones from children's residences. Multiple linear regression analysis was undertaken to assess associations between cognitive performance and greenness (aß) with 95% confidence intervals (CI) and adjusted for potential confounding variables. Significance was set at q < 0.05 after False Discovery Rate (FDR) correction. RESULTS: A positive association was found between the NDVI Interquartile Range (IQR) at 2000 m and the WISC-IV block design test score (aß 2000 = 1.18, 95% CI = 0.31, 2.06; q < 0.05), which assesses perceptual reasoning. Positive associations were found with NDVI IQR at 1500 m and WISC-IV block design (aß1500 = 1.00, 95% CI = 0.14, 1.86) and matrix reasoning (aß1500 = 0.83, 95% CI = 0.06, 1.61) scores, but neither survived FDR correction. No significant associations were found between NDVI IQR at any buffer size with other WISC-IV and ENI task scores. CONCLUSIONS: Greater exposure to greenness was associated with higher perceptual reasoning skills in 144 pre-pubertal boys living in Mexico City. Thus, urban planning should consider increasing vegetation in megacities, especially in neighbourhoods with high percentages of young children.

Prevalence of type 2 diabetes mellitus in the pediatric population of a third-level care hospital in Mexico City in 2013 and 2018.

BACKGROUND: Diabetes mellitus type 2 (T2DM) is a state of hyperglycemia due to a defect in the secretion and/or action of insulin, and it represents the most common form of diabetes worldwide. In Mexico, 10.3% of the adult population have been diagnosed with T2DM and it is expanding to the pediatric population. AIM: To evaluate and compare the prevalence of T2DM in the pediatric population at the Children's Hospital, "Hospital Infantil de México Federico Gómez (HIMFG)", at two time periods: 2013 vs 2018. METHODS: A comparison of two cross-sectional studies was done (2013 and 2018). The study population was comprised of children and adolescents 8-17 years old, from the Diabetes Clinic at the aforementioned institution. A comprehensive interrogation regarding family history and perinatal antecedents was performed. Complete blood work after 12 h of fasting was obtained to determine serum levels of glucose, glycated hemoglobin, lipid profile, C-peptide, and insulin. The data were analysed using the statistical software package SPSS v. 23.0. A P value of < 0.05 was considered statistically significant. RESULTS: A total of 151 patients were included: 47 from 2013, and 104 from 2018. There were age differences noted between the two periods with younger patients presenting T2DM in 2013. Also, T2DM predominated in the male sex in 55.36% in 2013 vs 32.7% in 2018. An increased prevalence of T2DM was noted from 2013 to 2018 (20.2% vs 33.0%, respectively), which was a statistically significant 12.8% increase (P < 0.0001). The illness phenotype was more aggressive in the 2018 group with the presence of a higher proportion of obesity, insulin resistance, and adverse lipid profiles. CONCLUSION: The prevalence of T2DM at the HIMFG institution from 2013 to 2018 increased by 12.8% (20.2% vs 33.0%, respectively). The study results demonstrate the need for vigilance in T2DM trends, and to strengthen programs of healthy nutrition and physical activity as well as early detection and risk factors for obesity, data on insulin resistance, and metabolic syndrome, with the aim of preventing the development of T2DM.

A Multi-Component Educational Intervention for Addressing Levels of Physical Activity and Sedentary Behaviors of Schoolchildren.

Physical inactivity and a sedentary lifestyle are risk factors for excess weight and obesity in childhood. It is, therefore, necessary to adopt strategies which can modify these behaviors during childhood, the age at which habits are formed. This study aimed to evaluate the impact of an educational intervention using digital media and face-to-face activities involving children, parents, and the school community on the level of physical activity and sedentary behavior among schoolchildren. This was a secondary analysis of data obtained from a community trial in which students from four primary schools in Mexico City participated. Two schools were assigned to the intervention group (IG) and two to the control group (CG). The intervention lasted 12 months and included a face-to-face component, which involved sessions and workshops for parents and children, as well as visual material for children and a distance component utilizing electronic means (web portal and text messages to mobile phones) for parents. Anthropometric measurements were taken and information was collected on moderate to vigorous physical activity performed by the children and on the time that the schoolchildren spent in front of screens at the beginning of the study and at 6 and 12 months. Information on 201 children from the IG and 167 children from the CG was included in the analysis. At 12 months, the IG showed a mean decrease of 33.4 min/d [95% CI: -53.5 to -13.3] in screen time, while the CG showed an increase of 12.5 min/d [CI 95%: -10.5 to 35.6], p = 0.003. After 12 months of follow-up, applying this educational intervention reduced the time that schoolchildren spent in front of screens. Educational intervention is a feasible and accessible strategy for promoting changes in sedentary behaviors in the school-age population.

Effects of Carbonated Beverage Consumption on Oral pH and Bacterial Proliferation in Adolescents: A Randomized Crossover Clinical Trial.

Sugary soft drinks modify salivary pH and favor bacterial proliferation and are associated with the development of caries. Information on the effects of consuming carbonated drinks without sucrose is limited. Methods: In this crossover clinical trial, salivary and dental biofilm pH were determined at 0, 5, 10, 15, 30, 45, and 60 min after the participants (n = 18) ingested a soft drink with sucrose, a soft drink with aspartame/acesulfame K, carbonated water, and plain water on different days. Dental biofilm cultures were conducted at 0- and 120-min. Results: Salivary pH decreased significantly after ingestion of the sucrose-containing soft drink when compared with the other types of beverages (median difference, -0.3--0.4, p ≤ 0.05), and the greatest difference was found with mineral water. A greater bacterial proliferation (Colony Forming Units [CFU]) was observed after ingestion of the drink with sucrose (↑310 × 103 CFU, p ≤ 0.01), followed by the drink with aspartame/acesulfame K (↑160 × 103 CFU, p ≤ 0.01) and carbonated water (↑60 × 103 CFU, p ≤ 0.05). No significant changes in bacterial proliferation were observed after the consumption of natural water. Conclusions: Ingestion of sucrose-containing soft drinks favors the acidification of salivary pH and the bacterial proliferation of dental biofilm. Although to a lesser extent, soft drinks containing aspartame/acesulfame K also favor bacterial proliferation.

Bone Age Reading by DXA Images should not Replace Bone Age Reading by X-ray Images.

X-ray image of the hand is the most used technique to estimate bone age in children. For the analysis of bone mineral density using DXA in children, bone age may help to adjust such measurement in some cases. During image acquisition in DXA, an anteroposterior image of the hand may be acquired and used to evaluate bone age but few studies have evaluated the agreement between conventional X-ray and DXA images. The aim of the study was to determine bone age estimation agreement between conventional X-ray images and DXA in children and adolescents aged 5 to 16 years of age. We performed an analytical cross-sectional study of 711 healthy subjects. Subject´s bone age, both in conventional X-ray, and DXA images were read independently by two expert evaluators blinded for chronological age. Intraobserver and inter-observer reproducibility were evaluated using Intraclass Correlation Coefficient (ICC), and the agreement between bone age estimations made by both evaluators was analyzed using ICC and Bland-Altman analysis. General agreement between techniques measured through ICC was 0.99 with a mean difference of 6 months between techniques being older the ages obtained by DXA. The agreement limits were around ±2 years, which means that 95% of all differences between techniques were covered within this range. We found a high level of ICC agreement in bone age readings from X-ray and DXA images although we observed overestimation of bone age measurements in DXA. Differences between techniques were greater in women than in men, especially at the ages corresponding to puberty. Bone age measurement in DXA images appears not to be reliable; hence it should be suggested to perform conventional radiography of the hand to assess bone age taking into account that X-ray images have better resolution.

Evidence of Unhealthy Dietary Patterns in the School Lunch Sent from Home for Children in Mexico City.

The identification and characterization of dietary patterns are tools that are used to assess associations between diet and health or disease conditions. In Mexico, studies have examined dietary patterns in children for breakfast or for the whole day, but not specifically for their school lunch. The aim was to describe dietary patterns identified in school lunch and their association with the nutritional status and metabolic parameters of schoolchildren. In this cross-sectional study on schoolchildren from four elementary schools of Mexico City, we recorded anthropometry measurements, a fasting blood sample was collected, and metabolic parameters were determined. We obtained information on the foods and beverages that children brought for their school lunch; estimated the caloric and nutritional content; and created food groups to obtain dietary patterns from the energy provided by those groups. Among the 350 schoolchildren (mean age, 7.9 ± 1.2 years) included, 24.9% and 21.7% presented having overweight and obesity, respectively. A total of 89.4% of schoolchildren brought the school lunch from home. Using the K-means method, the following four dietary patterns were identified: (1) sandwiches, tortas, and sweetened dairy products were consumed by 13.1% (n = 46) of the schoolchildren; (2) sweet snacks were consumed by 50.3% (n = 176); (3) sweetened dairy products were brought by 15.1% of the children (n = 53); and (4) sandwiches and tortas were brought by 21.4% (n = 75). These four patterns showed significant differences in terms of the caloric and nutritional contents (p < 0.001). Energy sources in the identified patterns were primarily sugars (15.8-40%). No association was found between the anthropometric and metabolic parameters of children and the dietary patterns. No dietary pattern obtained from the school lunch could be considered as healthy, since all of them had high energy content, and a high percentage of the energy was from sugars from ultra-processed foods and beverages.

Survival analysis and mortality predictors of COVID-19 in a pediatric cohort in Mexico.

Background: The new coronavirus SARS-CoV-2 pandemic has been relatively less lethal in children; however, poor prognosis and mortality has been associated with factors such as access to health services. Mexico remained on the list of the ten countries with the highest case fatality rate (CFR) in adults. It is of interest to know the behavior of COVID-19 in the pediatric population. The aim of this study was to identify clinical and sociodemographic variables associated with mortality due to COVID-19 in pediatric patients. Objective: Using National open data and information from the Ministry of Health, Mexico, this cohort study aimed to identify clinical and sociodemographic variables associated with COVID-19 mortality in pediatric patients. Method: A cohort study was designed based on National open data from the Ministry of Health, Mexico, for the period April 2020 to January 2022, and included patients under 18 years of age with confirmed SARS-CoV-2 infection. Variables analyzed were age, health services used, and comorbidities (obesity, diabetes, asthma, cardiovascular disease, immunosuppression, high blood pressure, and chronic kidney disease). Follow-up duration was 60 days, and primary outcomes were death, hospitalization, and requirement of intensive care. Statistical analysis included survival analysis, prediction models created using the Cox proportional hazards model, and Kaplan-Meier estimation curves. Results: The cohort included 261,099 cases with a mean age of 11.2 ± 4 years, and of these, 11,569 (4.43%) were hospitalized and 1,028 (0.39%) died. Variables associated with risk of mortality were age under 12 months, the presence of comorbidities, health sector where they were treated, and first wave of infection. Conclusion: Based on data in the National database, we show that the pediatric fatality rate due to SARS-CoV-2 is similar to that seen in other countries. Access to health services and distribution of mortality were heterogeneous. Vulnerable groups were patients younger than 12 months and those with comorbidities.

A Genetic Risk Score Improves the Prediction of Type 2 Diabetes Mellitus in Mexican Youths but Has Lower Predictive Utility Compared With Non-Genetic Factors.

Background: Type 2 diabetes (T2D) is a multifactorial disease caused by a complex interplay between environmental risk factors and genetic predisposition. To date, a total of 10 single nucleotide polymorphism (SNPs) have been associated with pediatric-onset T2D in Mexicans, with a small individual effect size. A genetic risk score (GRS) that combines these SNPs could serve as a predictor of the risk for pediatric-onset T2D. Objective: To assess the clinical utility of a GRS that combines 10 SNPs to improve risk prediction of pediatric-onset T2D in Mexicans. Methods: This case-control study included 97 individuals with pediatric-onset T2D and 84 controls below 18 years old without T2D. Information regarding family history of T2D, demographics, perinatal risk factors, anthropometric measurements, biochemical variables, lifestyle, and fitness scores were then obtained. Moreover, 10 single nucleotide polymorphisms (SNPs) previously associated with pediatric-onset T2D in Mexicans were genotyped. The GRS was calculated by summing the 10 risk alleles. Pediatric-onset T2D risk variance was assessed using multivariable logistic regression models and the area under the receiver operating characteristic curve (AUC). Results: The body mass index Z-score (Z-BMI) [odds ratio (OR) = 1.7; p = 0.009] and maternal history of T2D (OR = 7.1; p < 0.001) were found to be independently associated with pediatric-onset T2D. No association with other clinical risk factors was observed. The GRS also showed a significant association with pediatric-onset T2D (OR = 1.3 per risk allele; p = 0.006). The GRS, clinical risk factors, and GRS plus clinical risk factors had an AUC of 0.66 (95% CI 0.56-0.75), 0.72 (95% CI 0.62-0.81), and 0.78 (95% CI 0.70-0.87), respectively (p < 0.01). Conclusion: The GRS based on 10 SNPs was associated with pediatric-onset T2D in Mexicans and improved its prediction with modest significance. However, clinical factors, such the Z-BMI and family history of T2D, continue to have the highest predictive utility in this population.

Endoscopic retrograde cholangiopancreatography by double-balloon enteroscopy in patients with surgically altered gastrointestinal anatomy

BACKGROUND: Endoscopic retrograde cholangiopancreatography (ERCP) allows a diagnostic and therapeutic evaluation of pancreatobiliary diseases. However, the procedure in patients with surgically altered gastrointestinal anatomy represents a technical challenge. OBJECTIVE: to report the diagnostic and therapeutic outcome of device-assisted enteroscopy (DAE) ERCP in patients with a surgically altered gastrointestinal anatomy. METHODS: a prospective cohort of patients with a history of surgically altered gastrointestinal anatomy undergoing DAE-ERCP in a referral center was used. A double-balloon enteroscope was used to reach the papillary area or the bilio-enteric anastomosis. The clinical and endoscopic characteristics, and technical, diagnostic and therapeutic success were described. Clinical and endoscopic differences were evaluated according to diagnostic success, as well as the biochemical response in those patients with therapeutic success. RESULTS: ninety-six procedures were included in the study in 75 patients. Roux-en-Y hepaticojejunostomy (RYHJ) was the main surgical anatomy (82.3%) and cholangitis was the main indication for ERCP (49%). Diagnostic success was obtained in 69.8% of the participants. Of these, therapeutic success was obtained in 83.6% (overall success 58.3%). Cases with a diagnostic success had a higher frequency of cholangiography compared to those without diagnostic success (94% vs 0%, p < 0.001), as well as a lower probability of a failed cannulation (1.5% vs 100%, p < 0.001). A significant improvement was observed in patients with a therapeutic success in bilirubin, transaminases and alkaline phosphatase levels (p < 0.05). CONCLUSIONS: ERCP by means of double-balloon enteroscopy is a useful technique in patients with a surgically altered gastrointestinal anatomy, in whom access to the bile duct is required. However, these procedures are very challenging and diagnostic and therapeutic success where achieved in up to 60% of cases

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Endoscopic retrograde cholangiopancreatography by double-balloon enteroscopy in patients with surgically altered gastrointestinal anatomy.

BACKGROUND: Endoscopic retrograde cholangiopancreatography (ERCP) allows a diagnostic and therapeutic evaluation of pancreatobiliary diseases. However, the procedure in patients with surgically altered gastrointestinal anatomy represents a technical challenge. OBJECTIVE: to report the diagnostic and therapeutic outcome of device-assisted enteroscopy (DAE) ERCP in patients with a surgically altered gastrointestinal anatomy. METHODS: a prospective cohort of patients with a history of surgically altered gastrointestinal anatomy undergoing DAE-ERCP in a referral center was used. A double-balloon enteroscope was used to reach the papillary area or the bilio-enteric anastomosis. The clinical and endoscopic characteristics, and technical, diagnostic and therapeutic success were described. Clinical and endoscopic differences were evaluated according to diagnostic success, as well as the biochemical response in those patients with therapeutic success. RESULTS: ninety-six procedures were included in the study in 75 patients. Roux-en-Y hepaticojejunostomy (RYHJ) was the main surgical anatomy (82.3%) and cholangitis was the main indication for ERCP (49%). Diagnostic success was obtained in 69.8% of the participants. Of these, therapeutic success was obtained in 83.6% (overall success 58.3%). Cases with a diagnostic success had a higher frequency of cholangiography compared to those without diagnostic success (94% vs 0%, p < 0.001), as well as a lower probability of a failed cannulation (1.5% vs 100%, p < 0.001). A significant improvement was observed in patients with a therapeutic success in bilirubin, transaminases and alkaline phosphatase levels (p < 0.05). CONCLUSIONS: ERCP by means of double-balloon enteroscopy is a useful technique in patients with a surgically altered gastrointestinal anatomy, in whom access to the bile duct is required. However, these procedures are very challenging and diagnostic and therapeutic success where achieved in up to 60% of cases.

Skeletal Maturation in the Current Pediatric Mexican Population.

OBJECTIVE: The most commonly used methods for bone age (BA) reading were described in the Caucasian population decades ago. However, there are secular trends in skeletal maturation and different BA patterns between ethnic groups. Automated BA reading makes updating references easier and more precise than human reading. The objective of the present study was to present automated BA reference curves according to chronological age and gender in the Mexican population and compare the maturation tempo with that of other populations. METHODS: The study included 923 healthy participants aged 5 to 18 years between 2017 and 2018. A hand radio-graph was analyzed using BoneXpert software to obtain the automated BA reading according to Greulich and Pyle (G&P) and Tanner-Whitehouse 2 (TW2) references. We constructed reference curves using the average difference between the BA and chronological age according to sex and age. RESULTS: The G&P and TW2 automated reference curves showed that Mexican boys exhibit delays in BA during middle childhood by 0.5 to 0.7 (95% confidence interval [CI], -0.9 to -0.2) years; however, they demonstrate an advanced BA of up to 1.1 (95% CI, 0.8 to 1.4) years at the end of puberty. Mexican girls exhibited a delay in BA by 0.3 to 0.6 (95% CI, -0.9 to -0.1) years before puberty and an advanced BA of up to 0.9 (95% CI, 0.7 to 1.2) years at the end of puberty. CONCLUSION: Mexican children aged <10 years exhibited a delay in skeletal maturity, followed by an advanced BA by approximately 1 year at the end of puberty. This may affect the estimation of growth potential in this population.

Exploring single nucleotide polymorphisms previously related to obesity and metabolic traits in pediatric-onset type 2 diabetes.

AIMS: To evaluate the association of 64 obesity-related polymorphisms with pediatric-onset type 2 diabetes and other glucose- and insulin-related traits in Mexican children. METHODS: Case-control and case-sibling designs were followed. We studied 99 patients with pediatric-onset type 2 diabetes, their siblings (n = 101) without diabetes, 83 unrelated pediatric controls and 137 adult controls. Genotypes were determined for 64 single nucleotide polymorphisms, and a possible association was examined between those genotypes and type 2 diabetes and other quantitative traits, after adjusting for age, sex and body mass index. RESULTS: In the case-pediatric control and case-adult control analyses, five polymorphisms were associated with increased likelihood of pediatric-onset type 2 diabetes; only one of these polymorphisms (CADM2/rs1307880) also showed a consistent effect in the case-sibling analysis. The associations in the combined analysis were as follows: ADORA1/rs903361 (OR 1.9, 95% CI 1.2; 3.0); CADM2/rs13078807 (OR 2.2, 95% CI 1.2; 4.0); GNPDA2/rs10938397 (OR 2.2, 95% CI 1.4; 3.7); VEGFA/rs6905288 (OR 1.4, 95% CI 1.1; 2.1) and FTO/rs9939609 (OR 1.8, 95% CI 1.0; 3.2). We also identified 16 polymorphisms nominally associated with quantitative traits in participants without diabetes. CONCLUSIONS: ADORA/rs903361, CADM2/rs13078807, GNPDA2/rs10938397, VEGFA/rs6905288 and FTO/rs9939609 are associated with an increased risk of pediatric-onset type 2 diabetes in the Mexican population.

Frecuencia de abandono del tratamiento en pacientes pediátricos con leucemia linfoblástica aguda / Treatment abandonment in pediatric patients with acute lymphoblastic leukemia

Introducción. El abandono constituye el extremo del espectro de incumplimiento del tratamiento. En niños con cáncer, cualquiera que sea la causa que lleve a interrumpir el tratamiento, conduce a la progresión de la enfermedad, a recaídas o a la muerte. Por lo anterior, el propósito de este estudio fue conocer la frecuencia de abandono del tratamiento en pacientes pediátricos con leucemia linfoblástica aguda a nivel internacional, y antes y después de la implementación del Seguro Popular en México. Métodos. Se llevaron a cabo una revisión sistemática de la literatura sobre la frecuencia de abandono y un estudio de cohorte retrospectiva de expedientes de pacientes diagnosticados durante dos periodos de tiempo (2001-2003 y 2007-2009) en siete entidades de la República Mexicana. Resultados. La revisión de la literatura mostró que el abandono del tratamiento en pacientes pediátricos con leucemia linfoblástica aguda se circunscribe a los países en vías de desarrollo, con una tasa promedio de abandono de 24% -que puede llegar a ser hasta de 64%- con tendencia a disminuir con el tiempo. La frecuencia de abandono previa al Seguro Popular fue de 21.4%, en contraste con el 13.3% posterior a su implementación. Durante las fases tempranas de tratamiento y en los estados de Hidalgo y Puebla se registró el mayor porcentaje de abandono del tratamiento. Conclusiones. Es posible que, en comparación con lo que sucede en otras partes del mundo, la menor tasa de abandono al tratamiento de niños con leucemia linfoblástica aguda afiliados al Seguro Popular se deba a los apoyos sociales y económicos relacionados con el programa. Sin embargo, la frecuencia de abandono continua siendo alta por lo que se requiere de otras acciones para mejorar este problema.

Background. Abandonment is at the end of the spectrum of noncompliance. In children with cancer, whatever the cause that leads to treatment abandonment results in disease progression, recurrence and death. Therefore, the purpose of this study was to determine the frequency of treatment abandonment in pediatric patients with acute lymphoblastic leukemia (ALL) affiliated with the Seguro Popular insurance program. Methods. We conducted a systemaic review of the literature on the frequency of abandonment and a retrospective cohort study of clinical files of patients diagnosed during 2001 to 2003 and 2007 to 2009 in seven Mexican states. Results. A review of the literature shows that, among pediatric patients with ALL, treatment abandonment is seen almost only in developing countries and the documented rates may be as high as 64%, but with a diminishing tendency. The abandonment rate for children affiliated with the Seguro Popular insurance program was 13.3% during 2007 to 2009. In contrast, there was a rate of 21.4% of patients who abandoned before their implementation. The highest rates of treatment abandonment were observed during early treatment stages and were seen in hospitals from the states of Hidalgo and Puebla. Conclusions. In comparison to other countries, a lower rate of treatment abandonment has been seen in pediatric patients with ALL affiliated with the Seguro Popular insurance program. This observation would be related to the social and economic support provided by this program; however, the rate of abandonment is still high, making it necessary to introduce additional actions in order to improve this issue.

Satisfacción con la atención médica que reciben niños y adolescentes con leucemia linfoblástica aguda: experiencia en México con pacientes afiliados al Seguro Popular / Satisfaction with medical care of children and adolescents with acute lymphoblastic leukemia: experience in Mexico with patients affiliated with the Seguro Popular insurance program

Introducción. La satisfacción forma parte de la evaluación de la calidad de la atención. Se refiere a la percepción de la cobertura de las necesidades de salud. El objetivo de este trabajo fue identificar el grado de satisfacción con la atención que reciben los pacientes pediátricos con leucemia linfoblástica aguda afiliados al Seguro Popular. Métodos. Tras realizar una revisión de la literatura sobre la satisfacción de la atención médica de pacientes pediátricos con cáncer, se llevaron a cabo entrevistas a familias de pacientes pediátricos con leucemia linfoblástica aguda en 20 hospitales que reciben apoyo del Seguro Popular. Resultados. En la revisión se encontró información limitada sobre la satisfacción con la atención de niños con cáncer. A pesar de ello, se observó que, en general, las familias se encuentran satisfechas con la atención recibida, y que la comunicación con el equipo de salud es el factor más destacado. Al evaluar la satisfacción de las familias de pacientes afiliados al Seguro Popular se observan fortalezas en cuanto al trato y la información que reciben los pacientes. Se detectaron áreas de oportunidad para mejorar la calidad de la atención relacionadas con los tiempos de espera y la comprensión de la información. El 91.9% de los entrevistados estuvieron total o parcialmente de acuerdo en que el Seguro Popular ha contribuido a mejorar la atención de las unidades médicas. Conclusiones. Los familiares de los pacientes pediátricos con leucemia linfoblástica aguda afiliados al Seguro Popular se encuentran satisfechos con la atención médica recibida. Sin embargo, se detectaron áreas de oportunidad para mejorar la calidad de la atención.

Background. Satisfaction is part of the evaluation of the quality of care and refers to the perception of the coverage of health needs. The aim of this study was to identify the level of satisfaction with care received by pediatric patients with ALL in Mexico affiliated with the Seguro Popular insurance program. Methods. The first phase of this study was a review of the literature about satisfaction with medical care of pediatric patients with cancer. The second phase consisted of family interviews of pediatric ALL patients in 20 hospitals supported by the Seguro Popular insurance program. Results. The literature review found limited information on satisfaction with the care of children with cancer; nevertheless, we observed that families, in general, are satisfied with the health care, and communication with the health team is the most relevant factor. When assessing patient satisfaction of families affiliated with the Seguro Popular insurance program, we observed strengths in the areas of care and information received by patients and families. We identified improvement opportunities in the quality of care in relation to waiting times and understanding of information provided; 91.9% of respondents are completely or partially in agreement that the Seguro Popular insurance program has helped to improve the quality of health care provided by the medical units. Conclusions. Families of pediatric ALL patients affiliated with the Seguro Popular insurance program are satisfied with the delivery of health care; however, some improvement opportunities in the quality of care were detected.

Calidad de vida de niños mexicanos con leucemia linfoblástica aguda atendidos por el Seguro Popular / Quality of life in Mexican children with acute lymphoblastic leukemia affiliated with the Seguro Popular insurance program

Introducción. La calidad de vida relacionada a la salud es un constructo multidimensional que integra la percepción ante la enfermedad, el tratamiento y el funcionamiento en las áreas física, psicológica y de salud social de cada individuo. El objetivo de este estudio fue disponer de un instrumento confiable que evaluara la calidad de vida relacionada a la salud en niños mexicanos con leucemia linfoblástica aguda. Métodos. Primero, se realizó una revisión sistemática de la literatura hasta el año 2011 y se seleccionaron algunos estudios a partir de Medline. Se identificó que el instrumento Pediatric Cancer Quality of Life Inventory (PCQL-3) es uno de los que más se ha utilizado para evaluar la calidad de vida relacionada a la salud en niños con leucemia linfoblástica aguda. Después, este instrumento se aplicó a 123 pacientes atendidos en el Hospital Infantil de México Federico Gómez, así como a sus padres. Resultados. De la revisión sistemática, se seleccionaron 17 estudios acerca del desarrollo de instrumentos para medir la calidad de vida relacionada a la salud en niños con leucemia linfoblástica aguda, y 15 que describen la calidad de vida. En los 123 pacientes evaluados, se determinó que la calidad de vida relacionada a la salud fue menor en los niños con leucemia linfoblástica aguda de alto riesgo y en las etapas iniciales del tratamiento. También se pudo comprobar que las náuseas y la ansiedad ante los procedimientos son las áreas con mayor afección. Al analizar los resultados de la calidad de vida relacionada a la salud entre los pacientes y los padres, se determinó que existe una buena concordancia (α Cronbach = 0.834). Conclusiones. La medición de la calidad de vida relacionada a la salud en niños con leucemia linfoblástica aguda es parte fundamental para la evaluación integral de su tratamiento y pronóstico. La escala PCQL-3 fue apropiada para la población de niños mexicanos con leucemia linfoblástica aguda.

Background. Health related quality of life (HRQoL) is a multidimensional construct that integrates the individual perception to the disease, treatment, and performance in physical, psychological and social health areas. The aim of this study was to provide a reliable instrument to measure HRQoL in Mexican children with acute lymphoblastic leukemia (ALL). Methods. The study was conducted in two phases. In the first phase we conducted a systematic review of the literature until 2011. Studies were selected from Medline. It was found that Pediatric Cancer Quality of Life Inventory (PCQL-3) is one of the most widely used instruments to assess HRQoL in children with ALL; therefore, it was applied to 123 patients treated at the Hospital Infantil de Mexico Federico Gomez and to their parents in the second phase of the study. Results. From the systematic review, we selected 17 studies of the development of instruments to measure HRQoL in children with ALL, and 15 which described their quality of life. In the 123 patients evaluated, we found that HRQoL was lower among children with high-risk ALL and in those children during the early stages of treatment. It was also found that the most common conditions are nausea and anxiety related to medical procedures. Good agreement (Cronbach α = 0.834) was found in the scores of HRQoL between patients and parents. Conclusions. HRQoL measurement in children with ALL is a central part of the comprehensive assessment of their treatment and prognosis. The PCQL-3 scale is appropriate for its use in Mexican children.

Factores pronósticos de supervivencia en pacientes pediátricos con leucemia linfoblástica aguda afiliados al Seguro Popular / Prognostic factors for survival in pediatric patients with acute lymphoblastic leukemia affiliated with the Seguro Popular insurance program

Introducción. La leucemia linfoblástica aguda es la neoplasia más común en menores de 15 años. Se han identificado factores pronósticos como la edad al diagnóstico, el sexo, la traslocación de genes y el estado nutricional, entre otros. El objetivo de este trabajo fue evaluar algunos de estos factores en pacientes pediátricos con leucemia linfoblástica aguda afiliados al Seguro Popular, destacando los factores socioeconómicos. Métodos. Se trata de un estudio retrospectivo basado en la revisión de 391 expedientes clínicos de nueve hospitales con diferentes tasas de supervivencia, acreditados por el Seguro Popular. Se realizaron análisis descriptivos de variables y de supervivencia por el método Kaplan-Meier, utilizando el programa SPSS v 18.0. Resultados. Menos de la mitad de los pacientes (41.7%) fueron atendidos en hospitales de tercer nivel. Estos presentaron una tasa de supervivencia de 82% a cuatro años de seguimiento. Para los pacientes atendidos en hospitales de segundo nivel, la tasa de supervivencia fue de 55%. Los resultados mostraron que las características del hogar y familiares fueron factores pronósticos de supervivencia. Destacaron el mayor grado de educación, las redes sociales de apoyo y el número de proveedores económicos de la familia. Conclusiones. Los factores que intervienen en el pronóstico del paciente con leucemia linfoblástica aguda son diversos. Se mostró que los factores relacionados con la madre mejoran la supervivencia, aunque se requiere profundizar en este tema.

Introduction. Acute lymphoblastic leukemia (ALL) is the most common malignancy in children <15 years of age. Prognostic factors for survival have been identified such as age at diagnosis, sex, translocation of genes and nutritional status, among others. The aim of this study was to evaluate some of these factors in pediatric patients with ALL affiliated with the Seguro Popular insurance program with an emphasis on socioeconomic factors. Methods. This is a retrospective study based on the review of 391 clinical charts from nine hospitals accredited by the Seguro Popular insurance program with different survival rates. Descriptive and survival Kaplan-Meier analyses were performed with the statistical program SPSS v.18.0. Results. Less than half (41.7%) of the patients were treated at tertiary-care level hospitals with a 4-year survival rate at follow-up of 82%, whereas for secondary-care level hospitals the survival rate was 55%. Results show that household and parental characteristics were predictive of survival, in particular those with higher educational level, support networks and the number of family providers. Conclusions. Several factors are involved in the prognosis of ALL patients. Maternal factors improve survival, but these need to be thoroughly examined.

Estructura hospitalaria y su relación con la sobrevida de pacientes pediátricos con leucemia linfoblástica aguda / Hospital structure and its relation to survival in pediatric patients with acute lymphoblastic leukemia

Introducción. Se han identificado características de las unidades médicas que pueden considerarse como estándares ideales para la atención de pacientes pediátricos con cáncer. La implementación de estos estándares ha mejorado la sobrevida de los pacientes. Como parte de la evaluación de la calidad de la atención que reciben los niños con leucemia linfoblástica aguda afiliados al Seguro Popular, se analizó la relación entre la estructura de las unidades médicas y la mortalidad hospitalaria. Métodos. Se realizó un estudio transversal analítico en nueve hospitales con distintas tasas de supervivencia. Se evaluó la estructura de estos hospitales, considerando los estándares nacionales (cédula de acreditación para la atención de niños con cáncer de la Dirección General de Calidad y Educación en Salud, DGCES) e internacionales. Resultados. Se observó una correlación positiva entre el puntaje de la cédula de acreditación de la DGCES y la supervivencia hospitalaria (r = 0.811, p = 0.001). Al considerar los estándares de referencia internacional, se detectaron deficiencias en la disponibilidad de recursos materiales y humanos. Los factores relacionados con la supervivencia fueron la presencia de residentes de oncología/hematología pediátrica (r = 0.543, p = 0.001), contar con cuartos aislados (r = 0.455, p = 0.008) y tomógrafo (r = 0.454, p = 0.008), el número de pacientes que atienden los médicos o enfermeras por jornada laboral (r = 0.443, p = 0.021), los médicos adscritos a oncología/hematología (r = 0.399, p = 0.021), infectólogo pediatra (r = 0.385, p = 0.027) y cirujano pediatra (r = 0.378, p = 0.030). Conclusiones. La estructura de las unidades médicas se relaciona con la supervivencia de los pacientes pediátricos con leucemia linfoblástica aguda. Se requiere garantizar que los hospitales cuenten con los recursos materiales y humanos necesarios para asegurar una adecuada calidad de la atención a estos pacientes.

Background. Characteristics of medical units that can be considered as ideal standards for pediatric cancer patients have been identified. Implementation of these standards has resulted in improved survival of these patients. As part of the evaluation of the quality of care of pediatric patients with acute lymphoblastic leukemia (ALL) affiliated with the Seguro Popular insurance program, we examined the relationship between hospital structure and patient survival. Methods. A cross-sectional study was carried out in nine hospitals with different survival rates. We evaluated the structure of the hospitals considering national (accreditation program of the General Administration of Quality and Health Education-DGCES) and international standards. Results. There was a positive correlation between the score obtained from the accreditation program and hospital survival (r = 0.811, p = 0.001). When considering international reference standards, deficiencies in material and human resources were identified. Factors related to survival were pediatric oncology/hematology fellowship (r = 0.543, p = 0,001), isolation rooms (r = 0.455, p = 0.008), tomography (r = 0.454, p = 0.008), number of patients per physicians and nurses per shift (r = 0.443, p = 0.021), oncology/hematology physicians (r = 0.399, p = 0.021), pediatric infectious disease specialist (r = 0.385, p = 0.027) and pediatric surgeon (r = 0.378, p = 0.030). Conclusions. The structure of medical units is related to survival of pediatric patients with ALL. It is required that hospitals have human and material resources necessary for the optimal care of these patients.

Apoyo de organizaciones no gubernamentales a pacientes pediátricos con leucemia linfoblástica aguda afiliados al Seguro Popular en México / Support from nongovernmental organizations to pediatric patients with acute lymphoblastic leukemia affiliated with the Seguro Popular insurance program in Mexico

Introducción. El cáncer es la segunda causa de mortalidad infantil. La leucemia linfoblástica aguda es el tipo de cáncer más frecuente en niños. En México, las familias afiliadas al Seguro Popular tienen acceso a los servicios médico-quirúrgicos, farmacéuticos y hospitalarios que satisfacen sus necesidades de salud. El objetivo de este trabajo fue conocer el impacto del apoyo de las organizaciones no gubernamentales en la mortalidad de pacientes con leucemia linfoblástica aguda afiliados al Seguro Popular. Métodos. Se aplicaron 182 entrevistas a familiares de pacientes con leucemia linfoblástica aguda, vivos y fallecidos, en nueve instituciones afiliadas al Seguro Popular. Las preguntas se enfocaron en conocer los gastos durante el tratamiento, si recibían apoyo de alguna organización no gubernamental y en qué consistía este apoyo. Se realizó un análisis bivariado para conocer el peso estadístico del apoyo de las organizaciones no gubernamentales sobre la mortalidad cruda. Resultados. Los familiares de pacientes con leucemia linfoblástica aguda afiliados al Seguro Popular realizaron gastos complementarios durante el tratamiento. El apoyo de las organizaciones no gubernamentales fue estadísticamente significativo como protector de la mortalidad (OR = 0.25; IC 95% 0.11-0.54), y se efectuó en rubros como alimentos, medicamentos, antibióticos y catéteres. Conclusiones. Las organizaciones no gubernamentales son de gran apoyo para los pacientes con leucemia linfoblástica aguda y, aunque no suplen el apoyo del Seguro Popular, facilitan el tratamiento integral y parecen tener un efecto positivo en la reducción de la mortalidad.

Background. Cancer is the second leading cause of pediatric mortality. Acute lymphoblastic leukemia (ALL) is the most common type of cancer. In Mexico, families affiliated with the Seguro Popular insurance program have access to medical, pharmaceutical and hospital services that meet their health needs. The objective of the study was to determine the impact of nongovernmental organization (NGO) support on mortality in ALL patients affiliated with the Seguro Popular program. Methods. We conducted 182 interviews with families with living and deceased patients with ALL in nine institutions affiliated with the Seguro Popular program. We inquired about the expenses necessary during ALL treatment and whether they received support from NGO and the type of support received. We performed bivariate analysis to determine the statistical weight of the support of NGO on crude mortality. Results. Families of patients with ALL affiliated with the Seguro Popular insurance program incurred additional expenses during treatment. NGO support was statistically significant in protection from mortality (OR = 0.25; 95% CI 0.11-0.54). Significant items were support with food, medicines, antibiotics and catheters. Conclusions. NGO offer a high level of support for ALL patients and although they are not a substitute for the support of the Popular Insurance Scheme, they provide a holistic type of support and demonstrate a positive effect in reducing mortality.

Estímulo iatrotrópico y tiempo al diagnóstico en pacientes pediátricos con leucemia linfoblástica aguda / Iatrotropic stimulus and lag time for pediatric patients with acute lymphoblastic leukemia

Introducción. La leucemia linfoblástica aguda (LLA) es una enfermedad potencialmente curable en la que el éxito del tratamiento depende de la detección oportuna de la enfermedad; por lo anterior, resulta relevante identificar los factores que influyen en el periodo previo al diagnóstico. El objetivo de este estudio es describir el intervalo entre el inicio de los síntomas atribuibles a la enfermedad y la confirmación diagnóstica, en términos del tiempo transcurrido (lag-time), del estímulo iatrotrópico y de la atención médica recibida, así como estimar la asociación de estos factores con la mortalidad. Métodos. Se revisaron los expedientes clínicos de 182 pacientes pediátricos con LLA en 9 centros de atención oncológica en la República Mexicana y se realizaron entrevistas a sus familiares para reconstruir el periodo previo al diagnóstico. Resultados. Se incluyeron 99 pacientes vivos y 83 que fallecieron, con una media de edad de 7.3 ± 4.7 años. El promedio de tiempo entre el inicio de los síntomas y el diagnóstico fue de 43.5 ± 22.5 días y acudieron a un promedio de 2.3 consultas antes de la confirmación diagnóstica. Los principales motivos para solicitar la atención médica fueron: astenia y adinamia (47.4%), fiebre (44.8%), palidez (44.3%), hiporexia/anorexia (20.9%) y cefalea (19.9%). El número de médicos especialistas no oncólogos consultados y de consultas previas al diagnóstico resultaron factores protectores para la mortalidad (OR 0.77 y 0.64, respectivamente). Conclusiones. El tiempo de espera entre el inicio de los síntomas y la confirmación diagnóstica es mayor al reportado en países desarrollados; esto se debe, principalmente, a la atención médica recibida. El número de médicos y de consultas previas resultaron factores protectores para mortalidad, probablemente como consecuencia de la detección oportuna y la vigilancia médica de los síntomas inespecíficos que orientan a la presencia de la enfermedad.

Background. Acute lymphoblastic leukemia (ALL) is a potentially curable disease where success of the treatment depends on the timely detection of the disease; therefore, it is important to identify those influencing factors during the prediagnostic period. The objective of this study was to describe the interval time from onset of symptoms attributable to the disease to the diagnostic confirmation in terms of elapsed time (lag-time), iatrotropic stimulus and received medical care, as well as to estimate the association of these factors with mortality. Methods. We reviewed 182 clinical files from pediatric patients with ALL in nine cancer treatment centers in Mexico and conducted interviews with their families to rebuild the run-up time until diagnosis. Results. We included 99 living patients and 83 patients who died; average age of the patients was 7.3 ± 4.7 years. The average time between symptom onset and diagnosis was 43.5 ± 22.5 days. Patients had an average of 2.3 consultations prior to diagnostic confirmation. The main reasons for requesting medical attention were asthenia and adynamia (47.4%), fever (44.8%), pallor (44.3%), hyperoxia/anorexia (20.9%) and headache (19.9%). The number of non-oncological physicians surveyed and number of consultations until diagnosis were protective factors for mortality (OR 0.77 and 0.64, respectively). Conclusions. Time between symptom onset and diagnostic confirmation is longer than what has been reported in developed countries mainly due to medical attention received. The number of physicians and number of prior consultations were protective factors for mortality, probably as a result of early detection and medical surveillance of nonspecific symptoms that lead to the presence of the disease.