Tamizaje, prevalencia, diagnóstico previo, tratamiento y control de hipertensión, hipercolesterolemia y diabetes en adultos mexicanos. Ensanut 2022.

OBJETIVO: Describir las estimaciones de tamizaje, prevalencia, diagnóstico previo, tratamiento y control de hipertensión, hipercolesterolemia y diabetes, así como sus factores asociados en los adultos mexicanos. Material y métodos. Se utilizó información de los adultos de 20 años o más participantes de la Encuesta Nacional de Salud y Nutrición 2022 (Ensanut 2022). Se presentan estimaciones de prevalencias con sus intervalos de confianza al 95%, y modelos de regresión logística múltiple para cada padecimiento, con factores asociados al tamizaje, diagnóstico previo, tratamiento y control. RESULTADOS: El tamizaje de estas tres enfermedades es bajo, menor a 15%. La prevalencia de hipercolesterolemia y de diabetes es de 18% y la de hipertensión es 27.8%; cerca de la mitad conoce su diagnóstico. La proporción de pacientes con tratamiento farmacológico ha incrementado, pero menos de la mitad está en control. Conclusión. Es recomendable que la detección de estas enfermedades se haga de manera integrada con otros factores de riesgo cardiovascular. Se necesita aumentar los porcentajes de tamizaje, incrementar la proporción de enfermos con diagnóstico previo, mejorar el porcentaje de tratamiento médico de estas enfermedades y, sobre todo, aumentar la proporción de enfermos con tratamiento en control metabólico.

Detección, diagnóstico previo y tratamiento de enfermedades crónicas no transmisibles en adultos mexicanos. Ensanut 2022.

OBJETIVO: Presentar las prevalencias de adultos que acudieron a realizarse pruebas de detección de enfermedades crónicas no transmisibles (ECNT) en el año previo, las prevalencias por diagnóstico previo de algunas ECNT, así como la proporción de los que siguen tratamiento farmacológico. Material y métodos. Se analizó la información de los cuestionarios de 11 895 adultos participantes de la Encuesta Nacional de Salud y Nutrición de 2022. Se presentan prevalencias e intervalos de confianza al 95%. RESULTADOS: En el año previo se realizaron pruebas de detección de diabetes 12.2%, de hipertensión 9.1% y de dislipidemias 9.0%. La prevalencia por diagnóstico previo de diabetes es de 10.9%, de hipertensión 15.9% y de hipercolesterolemia 30.6%; de éstos, siguen tratamiento farmacológico 89.5, 81.7 y 60.4%, respectivamente. Conclusión. Los porcentajes de quienes acudieron a realizarse pruebas de tamizaje siguen siendo bajas y aún son inferiores a los observados en 2012. Tanto las prevalencias por diagnóstico previo de diabetes y de hipercolesterolemia han aumentado, mientras que la de hipertensión disminuyó 0.17%. Es recomendable realizar la detección de factores de riesgo cardiovascular, incluyendo la diabetes, de manera integrada y se incrementen las tasas de tratamiento.

COVID-19 and the adequacy of antenatal care among Indigenous women: A retrospective crossover analysis.

BACKGROUND: Often marginalized and disadvantaged by systems of oppression, Indigenous populations commonly face significant barriers to accessing adequate antenatal care (ANC). The COVID-19 pandemic had an unprecedented impact on healthcare systems worldwide, including on the provision of antenatal care; this was especially so for Indigenous communities in many regions. As such, our study aimed to estimate the association between the COVID-19 pandemic and adequate ANC received by Indigenous women in Chiapas, Mexico. METHODS: We conducted a retrospective crossover analysis with data collected between June and December 2021 from Indigenous women who attended at least one ANC appointment at one of two health centers in San Cristóbal de las Casas, Chiapas. We used a multinomial logistic regression model considering the time frame (before and during the pandemic) as the primary independent variable. Adequate antenatal care comprised four dimensions: attendance by qualified personnel, timely first visit, sufficient frequency of visits, and adequacy of the content provided during the visits. RESULTS: During the COVID-19 pandemic, there was a significant drop in ANC adequacy, with 12.7% (95% CI: 8.3, 18.9) of Indigenous women receiving ANC, compared with the pre-pandemic rate of 52.5% (95% CI: 44.7, 60.3), among the 158 participants. The pandemic resulted in a reduction of 75.8% in the adequacy of ANC. Considering the four dimensions of adequacy, we found that having only one dimension was associated with a relative risk ratio (RRR) of 12.45 (95% CI: 6.40, 24.23), while having two or three dimensions was associated with a RRR of 5.23 (95% CI: 2.83, 9.65) when using adequate ANC as the category of reference. CONCLUSIONS: According to our results, Indigenous women's ANC adequacy was negatively affected by the COVID-19 pandemic. In light of these findings, we emphasize the importance of developing healthcare systems that are prepared to adapt consultation schemes by implementing virtual visits and incorporating community health workers.

The Trend in the Prevalence of Diabetes Mellitus in the Mexican Indigenous Population From 2000 to 2018.

Introduction: Diabetes is a worldwide public health problem. In Mexico, diabetes was the third leading cause of death in the total population in 2020. The indigenous people in Mexico are approximately 6%. This study aims to estimate the trends in diabetes prevalence from 2000 to 2018 in the group of Mexican indigenous language speakers and to analyze the main sociodemographic (e.g., age, educational and socioeconomic level, and the urbanicity of the area of residence) and clinical (e.g., age of diabetes onset, years with diabetes, and BMI) characteristics of this group. Methods: This cross-sectional study included participants aged ≥20 years from 4 National Health Surveys, 2000-2018. We presented the analyses for indigenous and nonindigenous strata. Logistic models adjusted were used to estimate the trend of diabetes in the study period. Results: We found a significant increase in the prevalence of diabetes in the indigenous group. This trend in the ORs was maintained when adjusting for age, sex, waist circumference, and area of residence. For the study period, the prevalence change in diagnosed diabetes in the indigenous group was greater than that in the nonindigenous group (OR=6.4, 95% CI=4.1, 8.8 and OR=3.3, 95% CI=2.5, 4.1, respectively). We also found a significant prevalence change in undiagnosed diabetes for the indigenous group (OR=7.7, 95% CI=1.3, 14.6). Conclusions: In contrast to the results in nonindigenous populations, our main result reveals an increasing probability of being diabetic in the indigenous population from 2006 to 2018. It is necessary to clarify the origin of the accelerated change in diabetes prevalence among the indigenous population in Mexico.

Reduction in contraceptive use during the COVID-19 pandemic among women in an indigenous Mexican community: a retrospective crossover study.

Background: Being indigenous, being a woman, and living in poverty are social determinants that contribute to reduced access to healthcare, including reproductive health services. The COVID-19 pandemic might have exacerbated this lag. Objective: This study explored how the COVID-19 pandemic affected the contraceptive use of a group of indigenous Mexican women and adolescents in their community. Methods: Between June and December of 2021, 158 indigenous Mexican women who had experienced recurrent pregnancies were interviewed at two health centers in San Cristóbal de las Casas, Chiapas. Participants were either pregnant when they completed the questionnaire or had been pregnant during the COVID-19 pandemic. Women were asked about their contraceptive practices before and during the pandemic. The change in contraceptive practice was estimated using a logistic model. Results: The COVID-19 pandemic reduced contraceptive use by 50%. Among women who wanted contraception, 58% did not receive it. During the pandemic, 77% of previous contraceptive users reported difficulty obtaining contraception, and only 23% sought family planning assistance. Conclusion: During the COVID-19 pandemic, indigenous women in the studied community used fewer contraceptive methods and did not use intrauterine devices. Additionally, there was a decline in the percentage of women using contraceptives. These results highlight the impact on indigenous populations and the difficulties they could face in accessing reproductive health services during health emergencies.

Diagnostic performance of questionnaires to identify individuals with impaired fasting glucose in Mexican adult population.

AIMS: To evaluate the diagnostic performance of five questionnaires to identify impaired fasting glucose (IFG) in Mexican adult population. METHODS: The study included 23,311 subjects from five cohorts, three composed of individuals who sought medical advice in their first level clinics or participated in research studies and two representative surveys of the Mexican population. The reference standard was IFG which was defined as a fasting glucose ≥ 100 mg/dL. Diagnostic performance was evaluated with specificity, sensitivity, positive and negative predictive values, area under the curve, and the proportion of correctly classified individuals. RESULTS: The prevalence of IFG ranged from 14.4 to 48.1 % across the cohorts. Diagnostic performance of the questionnaires varied in each cohort depending on IFG prevalence. The questionnaires designed by Rojas, American Diabetes Association and International Diabetes Federation had the best performance considering the correct classification (>66.0 %) of subjects in all cohorts. However, Rojas' questionnaire had the best balance between sensitivity and specificity across the cohorts. CONCLUSION: In the Mexican population, considering different scenarios, the Rojas' questionnaire had the best diagnostic performance. The implementation of questionnaires for the identification of prediabetes and undiagnosed diabetes requires further study in specific populations.

Sociodemographic and Personal Predictors of Exclusive Breastfeeding in Pregnant Mexican Women Using Public Health Services.

Exclusive breastfeeding (EBF) is a cost-effective healthy behavior for the mother-child dyad. Globally, rates of EBF are low. Little research has been conducted on the joint role of modifiable and nonmodifiable variables in pregnant women's decision-making. The aim was to develop and test a model that used personal and sociodemographic factors to predict whether pregnant women who use public healthcare services plan to breastfeed. In a nonprobabilistic sample of 728 pregnant Mexican women, self-efficacy, the planned behavior theory constructs, and the intention to breastfeed (BFI) were measured. A total 60% of the sample was randomly chosen to develop a predictive multivariate logistic regression model. The model was validated in the remaining 40%. Women in the highest tertiles of attitudes and self-efficacy had fourfold increased chances of having a high BFI (OR 4.2, 95% CI [2.4, 7.4]). Working was associated with a decreased intention to exclusively breastfeed (OR 0.61, 95% CI [0.37, 0.98]). The model predicted BFI with a sensitivity of 38.3% and specificity of 82.2%. While personal variables predict the BFI, working decreases women's chances of breastfeeding. The results can be utilized to develop primary prevention strategies to help mothers who use public health services to breastfeed.

Slow gait speed is associated with dynapenic obesity in Mexican ambulatory older adults.

An increased risk of slow gait speed (GS) has been reported among older adults with decreased muscle strength, coupled with a concomitant increase in body fat known as dynapenic obesity (DO); however, these two conditions together have rarely been studied. The objective of this study was to determine the association between GS and DO in older Mexican ambulatory adults. A cross-sectional study was conducted; body fat percentage, and muscle strength and GS using EWGSOP criteria, were measured in 126 older ambulatory Mexican adults, with a mean age of 71 years old. The association was evaluated using controlled logistic regression models. Among ambulatory older adults with slow GS, the risk of DO was 3.4 times higher than among those without, controlling for age and sex (p<0.01). In conclusion, slow GS in ambulatory older adults can be a useful indicator for the early identification of DO.

The utility of the Edmonton Obesity Staging System for the prediction of COVID-19 outcomes: a multi-centre study.

BACKGROUND: Patients with obesity have an increased risk for adverse COVID-19 outcomes. Body mass index (BMI) does not acknowledge the health burden associated this disease. The performance of the Edmonton Obesity Staging System (EOSS), a clinical classification tool that assesses obesity-related comorbidity, is compared with BMI, with respect to adverse COVID-19 outcomes. METHODS: 1071 patients were evaluated in 11 COVID-19 hospitals in Mexico. Patients were classified into EOSS stages. Adjusted risk factors for COVID-19 outcomes were calculated and survival analysis for mechanical ventilation and death was carried out according to EOSS stage and BMI category. RESULTS: The risk for intubation was higher in patients with EOSS stages 2 and 4 (HR 1.42, 95% CI 1.02-1.97 and 2.78, 95% CI 1.83-4.24), and in patients with BMI classes II and III (HR 1.71, 95% CI 1.06-2.74, and 2.62, 95% CI 1.65-4.17). Mortality rates were significantly lower in patients with EOSS stages 0 and 1 (HR 0.62, 95% CI 0.42-0.92) and higher in patients with BMI class III (HR 1.58, 95% CI 1.03-2.42). In patients with a BMI ≥ 25 kg/m2, the risk for intubation increased with progressive EOSS stages. Only individuals in BMI class III showed an increased risk for intubation (HR 2.24, 95% CI 1.50-3.34). Mortality risk was increased in EOSS stages 2 and 4 compared to EOSS 0 and 1, and in patients with BMI class II and III, compared to patients with overweight. CONCLUSIONS: EOSS was associated with adverse COVID-19 outcomes, and it distinguished risks beyond BMI. Patients with overweight and obesity in EOSS stages 0 and 1 had a lower risk than patients with normal weight. BMI does not adequately reflect adipose tissue-associated disease, it is not ideal for guiding chronic-disease management.

Sociodemographic and Clinical Factors Associated with Severe Obesity in Adults.

BACKGROUND: In the last decades, obesity in general, including severe obesity (BMI ≥40 kg/m2), has increased disproportionately around the world, especially in low-income and lower-middle income regions. AIMS: To analyze sociodemographic and clinical characteristics of people with severe obesity in Mexico, as well as their associated factors. METHODS: A secondary analysis was carried out from the 2018-19 National Health and Nutrition Survey. Descriptive statistics and bivariate analyses by sex were used. Logistic models were estimated to identify the main factors associated with severe obesity. RESULTS: Of the total number of people with obesity in the country (2.2 million people), 3.6% had severe obesity, with an average age of 48.2. There were statistically significant differences by sex in the variables of age group, education, socioeconomic status, health insurance, hypertension, myocardial infarction, and heart failure. Being a woman, having hypertension, and hypertension/diabetes increased the odds of severe obesity. These associations were maintained when comparing people with a BMI <40 kg/m2, with those with a BMI ≥30 kg/m2 and a BMI <40 kg/m2. CONCLUSIONS: Severe obesity must appear on the Mexican political agenda. Data must be produced that can direct decision-making around the promotion of healthy lifestyles, and obesity prevention, treatment, and follow-up, based in people-centered care and through intersectoral strategies, multidisciplinary management, and holistic approaches.

Trends in the prevalence of metabolic syndrome and its components in Mexican adults, 2006-2018 / Tendencia en la prevalencia de síndrome metabólico y sus componentes en adultos mexicanos, 2006-2018

Abstract: Objective: To examine trends in the prevalence of metabolic syndrome (MS) and its components. Materials and methods: Data from 27 800 Mexican adults who participated in Ensanut 2006, 2012, 2016 and 2018 were analyzed. Linear regression was used across each Ensanut period to assess temporal linear trends in the prevalence of MS. Logistic regression models were obtained to calculate the percentage change, p-value for the trend and the association between the presence of MS and the risk of developing type 2 diabetes mellitus (T2DM) over 10 years using the Finnish Diabetes Risk Score (FINDRISC) and cardiovascular disease (CVD) using Globorisk. Results: The prevalence of MS in Mexican adults according to the harmonized definition was: 40.2, 57.3, 59.99 and 56.31%, in 2006, 2012, 2016 and 2018 respectively (p for trend <0.0001). In 2018, 7.62% of metabolic syndrome cases had a significant risk for incident DM2 and 11.6% for CVD. Conclusion: It is estimated that there are 36.5 million Mexican adults living with metabolic syndrome, of which 2 million and 2.5 million have a high risk of developing T2DM or cardiovascular disease respectively, over the next 10 years.

Resumen: Objetivo: Examinar las tendencias en la prevalencia del síndrome metabólico (SM) y de sus componentes. Material y métodos: Se analizaron datos de 27 800 adultos mexicanos que participaron en las Ensanut 2006, 2012, 2016 y 2018. Se utilizó regresión lineal en cada periodo de Ensanut para evaluar las tendencias lineales temporales en la prevalencia del SM. Se obtuvieron modelos de regresión logística para calcular el cambio porcentual, P para la tendencia y las asociaciones entre la SM con el riesgo de desarrollar en 10 años diabetes mellitus tipo 2 utilizando la Finnish Diabetes Risk Score (FINDRISC) y enfermedad cardiovascular utilizando Globorisk. Resultados: La prevalencia de SM en adultos mexicanos según la definición armonizada fue: 40.2, 57.3, 59.99 y 56.31%, en 2006, 2012, 2016 y 2018 respectivamente (p para tendencia <0.0001). En 2018, 7.62% de los casos de síndrome metabólico tenían un riesgo significativo de DM2 incidente y 11.6% de ECV. Conclusión: Se estima que los adultos mexicanos con síndrome metabólico son 36.5 millones; de ellos, dos millones tienen un alto riesgo de desarrollar DMT2 en los próximos 10 años y 2.5 millones enfermedades cardiovasculares.

Trends and age-period-cohort effects on hypertension mortality rates from 1998 to 2018 in Mexico.

Arterial hypertension is a major global health problem. It is the main risk factor for preventable death and the leading cause of premature death in the world. This study aims to describe the changes in hypertension-related mortality in Mexico between 1998 and 2018. Using death certificates and national population public data sets, a total of 335,863 deaths due to hypertension were found in Mexico, disaggregated by sex and age, during the time period covered in this study. An age-period-cohort analysis was conducted to show trends in hypertension mortality rates. Mortality due to hypertension in Mexico affects more women than men. In the most recent cohorts, the risk of dying from hypertension is two times higher in men compared to women. Hypertensive kidney disease is found to be the main underlying cause, with an average increase throughout the period studied. Our results indicate that mortality rates due to hypertension continue to grow and point to an alarming trend of mortality shifting towards younger ages, with sex-based disparities in absolute numbers and in changing trends.

The Association of Osteosarcopenia With Functional Disability in Community-Dwelling Mexican Adults 50 and Older.

Background: Osteosarcopenia (OS) has recently been described as a predictor of negative outcomes in older adults. However, this alteration in body composition has not been widely studied. In Mexico and Latin America, no information is available on its frequency or associated factors. Objective: To analyze the association between OS with FD in community-dwelling Mexican adults 50 and older. Design: Cross-sectional secondary data analysis was performed using primary data from a prospective study Frailty, Dynapenia and Sarcopenia Study in Mexican Adults (FraDySMex). Setting and Participants: Eight hundred and twenty-five people were included, 77.1% women, aged 70.3 ± 10.8 years old. Methods: OS was defined as when the person was diagnosed with sarcopenia (SP) plus osteopenia/osteoporosis. The SP diagnosis was evaluated in accordance with the criteria of the European Working Group for the Definition and Diagnosis of Sarcopenia (EWGSOP), and the osteoporosis diagnosis using World Health Organization (WHO) criteria. Muscle mass and bone mass were evaluated using dual-energy X-ray absorptiometry (DXA). FD was evaluated using the basic activities of daily living (BADL) and the instrumental activities of daily living (IADL). Additional sociodemographic and health co-variables were also included, such as sex, age, education, cognitive status, depression, comorbidity, hospitalization, polypharmacy, urinary incontinence, and nutrition variables such as risk of malnutrition and obesity. Associations between OS with FD were evaluated using multiple logistic regression. Results: The prevalence of OS was 8.9% and that of FD was 8.9%. OS was associated with FD [odds ratio (OR): 1.92; CI 95%: 1.11-3.33]. Conclusions and Implications: Comprehensive OS assessment could help clinicians identify risk factors early, and thus mitigate the impact on FD in older people.

Trends in the prevalence of metabolic syndrome and its components in Mexican adults, 2006-2018.

OBJECTIVE: To examine trends in the prevalence of metabolic syndrome (MS) and its components. MATERIALS AND METHODS: Data from 27 800 Mexican adults who participated in Ensanut 2006, 2012, 2016 and 2018 were analyzed. Linear regression was used across each Ensanut period to assess temporal linear trends in the prevalence of MS. Logistic regression models were obtained to calculate the percentage change, p-value for the trend and the association between the presence of MS and the risk of developing type 2 diabetes mellitus (T2DM) over 10 years using the Finnish Diabetes Risk Score (FINDRISC) and cardiovascular disease (CVD) using Globorisk. RESULTS: The prevalence of MS in Mexican adults according to the harmonized definition was: 40.2, 57.3, 59.99 and 56.31%, in 2006, 2012, 2016 and 2018 respectively (p for trend <0.0001). In 2018, 7.62% of metabolic syndrome cases had a significant risk for incident DM2 and 11.6% for CVD. CONCLUSION: It is estimated that there are 36.5 million Mexican adults living with metabolic syndrome, of which 2 million and 2.5 million have a high risk of developing T2DM or cardiovascular disease respectively, over the next 10 years.

[Trends in the prevalence of ARIs and ADDs in early childhood and associated factors: Ensanut 2012 and 100k.] / Tendencias en la prevalencia de IRA y EDA en la primera infancia y factores asociados: Ensanut 2012 y 100k.

OBJECTIVE: To compare the prevalence of acute respiratory infections (ARI) and acute diarrheal disease (ADD) among children younger than five years of age living in localities with less than 100 000 inhabitants in Encuesta Nacional de Salud y Nutrición (Ensanut) 2012 and Ensanut 100k (2018). In Ensanut 100k, we evaluate the associated factors. MATERIALS AND METHODS: Analysis of both surveys and of the Mexican Meteorological System. RESULTS: The estimated prevalence of ARI was 45.1% in 2012 vs. 32.9% in 2018. The decrease was significant among medium and high-income households. There were no changes in trends for ADD. Among households with lower EC, ARI was associated with roofing material, temperature, and rainy precipitation while ADD was associated with lack of piped water. CONCLUSIONS: The estimated prevalence of ARI has decreased in medium and high income households. Some households and weather conditions are associated with ARI and ADD.

OBJETIVO: Estimar y comparar las prevalencias de infec- ciones respiratorias agudas (IRA) y enfermedades diarreicas agudas (EDA) en menores de cinco años, residentes en localidades con menos de 100 000 habitantes, mediante análisis de la Encuesta Nacional de Salud y Nutrición (Ensanut) 2012 y la Ensanut 100k (2018). En la Ensanut 100k se evaluaron los factores asociados con IRA y EDA. MATERIAL Y MÉTODOS: Análisis de ambas encuestas e información meteorológica de la Comisión Nacional del Agua. RESULTADOS: La prevalencia global estimada de IRA fue de 45.1% en 2012 vs. 32.9% en 2018. La disminución fue significativa en hogares de medianas y mayores capacidades económicas (CE). No se observaron cambios significativos para las EDA. En hogares con menores CE, las IRA se asociaron con material del techo y temperatura y las EDA con privación de agua entubada. CONCLUSIONES: Entre 2012 y 2018, la prevalencia de IRA disminuyó en hogares de medianas y mayores CE. Algunas condiciones de vivienda y meteorológicas se asocian con IRA y EDA.

Tendencias en la prevalencia de IRA y EDA en la primera infancia y factores asociados: Ensanut 2012 y 100k / Trends in the prevalence of ARIs and ADDs in early childhood and associated factors: Ensanut 2012 and 100k

Resumen: Objetivo: Estimar y comparar las prevalencias de infecciones respiratorias agudas (IRA) y enfermedades diarreicas agudas (EDA) en menores de cinco años, residentes en localidades con menos de 100 000 habitantes, mediante análisis de la Encuesta Nacional de Salud y Nutrición (Ensanut) 2012 y la Ensanut 100k (2018). En la Ensanut 100k se evaluaron los factores asociados con IRA y EDA. Material y métodos: Análisis de ambas encuestas e información meteorológica de la Comisión Nacional del Agua. Resultados: La prevalencia global estimada de IRA fue de 45.1% en 2012 vs. 32.9% en 2018. La disminución fue significativa en hogares de medianas y mayores capacidades económicas (CE). No se observaron cambios significativos para las EDA. En hogares con menores CE, las IRA se asociaron con material del techo y temperatura y las EDA con privación de agua entubada. Conclusiones: Entre 2012 y 2018, la prevalencia de IRA disminuyó en hogares de medianas y mayores CE. Algunas condiciones de vivienda y meteorológicas se asocian con IRA y EDA.

Abstract: Objective: To compare the prevalence of acute respiratory infections (ARI) and acute diarrheal disease (ADD) among children younger than five years of age living in localities with less than 100 000 inhabitants in Encuesta Nacional de Salud y Nutrición (Ensanut) 2012 and Ensanut 100k (2018). In Ensanut 100k, we evaluate the associated factors. Materials and methods: Analysis of both surveys and of the Mexican Meteorological System. Results: The estimated prevalence of ARI was 45.1% in 2012 vs. 32.9% in 2018. The decrease was significant among medium and high-income households. There were no changes in trends for ADD. Among households with lower EC, ARI was associated with roofing material, temperature, and rainy precipitation while ADD was associated with lack of piped water. Conclusions: The estimated prevalence of ARI has decreased in medium and high income households. Some households and weather conditions are associated with ARI and ADD.

An anthropometry-based equation of fat mass percentage as a valid discriminator of obesity.

OBJECTIVE: To develop a new predictive equation for fat mass percentage (%FM) based on anthropometric measurements and to assess its ability to discriminate between obese and non-obese individuals. DESIGN: Cross-sectional study. SETTING: Mexican adults.ParticipantsAdults (n 275; 181 women) aged 20-63 years with BMI between 17·4 and 42·4 kg/m2. RESULTS: Thirty-seven per cent of our sample was obese using %FM measured by air-displacement plethysmography (BOD POD®; Life Measurement Instruments). The fat mass was computed from the difference between weight and fat-free mass (FFM). FFM was estimated using an equation obtained previously in the study from weight, height and sex of the individuals. The %FM estimated from the obtained FFM showed a sensitivity of 90·3 (95 % CI 86·8, 93·8) % and a specificity of 58·0 (95 % CI 52·1, 63·8) % in the diagnosis of obesity. Ninety-three per cent of participants with obesity and 65 % of participants without obesity were correctly classified. CONCLUSIONS: The anthropometry-based equation obtained in the present study could be used as a screening tool in clinical and epidemiological studies not only to estimate the %FM, but also to discriminate the obese condition in populations with similar characteristics to the participant sample.

Seroprevalence of dengue in school children in Mexico ages 6-17 years, 2016.

Background: Dengue is the most important arboviral disease in the world. Seroprevalence has been proposed as a marker of endemicity, however, studies are scarce. Methods: We conducted a cross-sectional, stratified cluster, random sample study to measure the seroprevalence of antibodies to dengue virus (DENV) in Mexico. The target population was school children ages 6-17 y from 22 endemic states in Mexico, clustered in four regions: Pacific, South-Central, Southeast and Low. Results: A total of 2134 subjects provided blood samples for immunoglobulin G antibody detection in serum by enzyme-linked immunosorbent assay. Overall, the seroprevalence of antibodies against DENV was 33.5% (95% confidence interval [CI] 27.5 to 40.1). The Southeast had the highest regional seroprevalence, reaching 70.9% (95% CI 60.3 to 79.7). Seroprevalence was higher in older children in the Southeast region: 62.1% (95% CI 46.9 to 75.2) in children 6-8 y and 82.6% (95% CI 73.8 to 88.9) in 13-17 years old (y). However, this was not consistent in all regions. Seroprevalence was associated with dengue incidence. Conclusions: DENV seroprevalence in Mexico was found to be heterogeneous at the country, regional and state levels. Seroprevalence was linked to long-term exposure and did not adequately reflect recent patterns of transmission, suggesting that utilization of a single epidemiological indicator to define endemic regions should be avoided.

Stature in adults as an indicator of socioeconomic inequalities in Mexico

[ABSTRACT]. Objective. To estimate the association between stature in Mexican adults and some sociodemographic factors. Methods. We studied a sample of 30 970 subjects, using anthropometric data from the 2012 National Health and Nutrition Survey (ENSANUT 2012). The first quartile was used as the cutoff to define short stature. We analyzed differences among stature strata for sociodemographic variables by using the Kruskal-Wallis test. We estimated odds ratios to measure the association between stature and sociodemographic variables, controlling for potential confounders. Results. Persons from the southern region of the country were some three times as likely to be of short stature than were subjects in the northern region. The stature difference between the Mexican states with the highest and the lowest average stature was larger than the average difference in stature between Mexico and the United States of America. Adults who had had less than six years of schooling presented the highest prevalence of short stature, regardless of sex, region of the country, place of residence (rural or urban), or the proportion of indigenous language speakers in a state. In addition, the stratum with the highest marginalization (percentage of the population lacking education and services, with a low income, and living in a small community) showed the highest prevalence of short stature. Conclusion. In Mexico, adults who are of short stature have unequal living conditions when compared to those of average or high stature, and this could drive increases in health inequity.

[RESUMEN]. Objetivo. Establecer la asociación entre la estatura de los mexicanos adultos y algunos factores sociodemográficos. Métodos. Sobre la base de datos antropométricos de la Encuesta Nacional de Salud y Nutrición de 2012 (ENSANUT 2012), estudiamos una muestra de 30 970 sujetos. Para definir la estatura baja, el umbral se estableció en el primer cuartil. Analizamos las diferencias entre los distintos estratos de estatura en relación con variables sociodemográficas utilizando la prueba de Kruskal-Wallis. Calculamos las razones de posibilidades para medir la asociación entre la estatura y las variables sociodemográficas, con control de posibles factores de confusión. Resultados. Las personas de la zona meridional del país tenían alrededor de tres veces más probabilidades de ser de estatura baja que las personas de la zona septentrional. La diferencia entre los estados mexicanos con la estatura promedio más alta y la estatura promedio más baja fue mayor que la diferencia promedio respecto de la estatura entre México y los Estados Unidos de América. La prevalencia más alta de estatura baja se registró en los adultos con menos de seis años de escolaridad, independientemente del sexo, la zona del país, el lugar de residencia (rural o urbano) y la proporción de hablantes de lenguas indígenas en un estado. Además, la prevalencia más alta de estatura baja se observó en el estrato de población más marginada (porcentaje de habitantes sin escolaridad ni servicios, con ingresos bajos y que vivían una comunidad pequeña). Conclusiones. En México, las condiciones de vida de los adultos de estatura baja son más desfavorables que las de los adultos de estatura media o alta, y esto podría contribuir a aumentar la inequidad en materia de salud.

[RESUMO]. Objetivo. Estimar a associação entre a estatura em adultos mexicanos e fatores sociodemográficos. Métodos. Foi estudada uma amostra de 30.970 indivíduos com base em dados antropométricos obtidos da Pesquisa Nacional sobre Saúde e Nutrição de 2012 (ENSANUT 2012). O primeiro quartil foi usado como valor de corte para definir baixa estatura. Foram analisadas as diferenças entre os estratos de estatura para as variáveis sociodemográficas com o uso do teste de Kruskal- Wallis. Foram estimados os odds ratios para medir a associação entre a estatura e as variáveis sociodemográficas, controlando-se os potenciais fatores de confusão. Resultados. Os indivíduos da região sul do país apresentaram uma chance quase três vezes maior de ter baixa estatura em comparação aos indivíduos da região norte. A diferença de estatura entre os estados mexicanos com a estatura média maior e a estatura média menor foi maior que a diferença média em estatura entre o México e os Estados Unidos. Os adultos com menos de seis anos de escolaridade apresentaram a prevalência mais elevada de baixa estatura, independentemente do sexo, região do país, zona de residência (rural ou urbana) ou proporção de falantes de línguas indígenas em um estado. Além disso, o estrato com maior marginação (porcentagem de habitantes com carência de educação e serviços, de baixa renda e vivendo em uma pequena comunidade) apresentou a prevalência mais elevada de baixa estatura. Conclusão. No México, os adultos com baixa estatura têm condições de vida desiguais comparados aos adultos com estatura média ou alta, contribuindo para maior iniquidade em saúde.

Stature in adults as an indicator of socioeconomic inequalities in Mexico.

OBJECTIVE: To estimate the association between stature in Mexican adults and some sociodemographic factors. METHODS: We studied a sample of 30 970 subjects, using anthropometric data from the 2012 National Health and Nutrition Survey (ENSANUT 2012). The first quartile was used as the cutoff to define short stature. We analyzed differences among stature strata for sociodemographic variables by using the Kruskal-Wallis test. We estimated odds ratios to measure the association between stature and sociodemographic variables, controlling for potential confounders. RESULTS: Persons from the southern region of the country were some three times as likely to be of short stature than were subjects in the northern region. The stature difference between the Mexican states with the highest and the lowest average stature was larger than the average difference in stature between Mexico and the United States of America. Adults who had had less than six years of schooling presented the highest prevalence of short stature, regardless of sex, region of the country, place of residence (rural or urban), or the proportion of indigenous language speakers in a state. In addition, the stratum with the highest marginalization (percentage of the population lacking education and services, with a low income, and living in a small community) showed the highest prevalence of short stature. CONCLUSION: In Mexico, adults who are of short stature have unequal living conditions when compared to those of average or high stature, and this could drive increases in health inequity.