Resumo O objetivo foi avaliar se a qualidade da dieta varia de acordo com a adequação da ingestão de água em residentes de São Paulo. Trata-se do Inquérito de Saúde de São Paulo, estudo transversal de base populacional. A ingestão de água total (potável, de bebidas e de alimentos) foi avaliada por meio de dois recordatórios alimentares de 24h e questionário complementar sobre a dieta, e a qualidade da dieta foi avaliada por meio do índice de qualidade da dieta revisado (IQDR) para a população brasileira. A Adequate Intake foi usada para estratificar os indivíduos. As associações foram testadas pelo teste Theil-Sen e pelo modelo de regressão logística. Observou-se ingestão de água de 2,20 L/d, e que a qualidade da dieta “necessita de modificações”. Exceto nos idosos em que não foi observada nenhuma associação, nos demais grupos mostrou-se que há associação positiva da ingestão de água com o IQDR, bem como com os componentes frutas totais e integrais. Estas associações foram mantidas mesmo após ajustes para variáveis de confusão. Nos adultos, observou-se que aqueles que ingeriram menos água tiveram menores pontuações para gorduras saturadas. A qualidade da dieta dos residentes de São Paulo é pior entre os que ingerem menos água.

Abstract The scope of the study was to evaluate the probability of the adequacy of water intake among residents of São Paulo, and to investigate if the quality of diet differs according to the adequacy of water intake. Data were extracted from the Health Survey of São Paulo, a cross-sectional, population-based study. Water intake (drinking water beverages and food) was evaluated using two 24-hours dietary recalls and a supplementary dietary intake questionnaire. Adequacy and classification of water intake was assessed using the corresponding Adequate Intake for sex and age of the individual. Dietary quality was evaluated using the revised Brazilian Healthy Eating Index (BHEI). The associations were tested using the Theil-Sen median test and logistic regression models. A low probability of adequate water intake was observed, and this decreased with advancing age. Except among the elderly, among whom no association was observed, a positive association between water intake and the BHEI was observed, and for the total and integral fruit components, which was maintained after confusion adjustments. Among adults, it was observed that those who ingested less water had even lower scores for saturated fats. The residents of São Paulo have low water intake, and the quality of diet is worse among those who drink less water.

Resumo O objetivo foi avaliar se a qualidade da dieta varia de acordo com a adequação da ingestão de água em residentes de São Paulo. Trata-se do Inquérito de Saúde de São Paulo, estudo transversal de base populacional. A ingestão de água total (potável, de bebidas e de alimentos) foi avaliada por meio de dois recordatórios alimentares de 24h e questionário complementar sobre a dieta, e a qualidade da dieta foi avaliada por meio do índice de qualidade da dieta revisado (IQDR) para a população brasileira. A Adequate Intake foi usada para estratificar os indivíduos. As associações foram testadas pelo teste Theil-Sen e pelo modelo de regressão logística. Observou-se ingestão de água de 2,20 L/d, e que a qualidade da dieta “necessita de modificações”. Exceto nos idosos em que não foi observada nenhuma associação, nos demais grupos mostrou-se que há associação positiva da ingestão de água com o IQDR, bem como com os componentes frutas totais e integrais. Estas associações foram mantidas mesmo após ajustes para variáveis de confusão. Nos adultos, observou-se que aqueles que ingeriram menos água tiveram menores pontuações para gorduras saturadas. A qualidade da dieta dos residentes de São Paulo é pior entre os que ingerem menos água.

Abstract The scope of the study was to evaluate the probability of the adequacy of water intake among residents of São Paulo, and to investigate if the quality of diet differs according to the adequacy of water intake. Data were extracted from the Health Survey of São Paulo, a cross-sectional, population-based study. Water intake (drinking water beverages and food) was evaluated using two 24-hours dietary recalls and a supplementary dietary intake questionnaire. Adequacy and classification of water intake was assessed using the corresponding Adequate Intake for sex and age of the individual. Dietary quality was evaluated using the revised Brazilian Healthy Eating Index (BHEI). The associations were tested using the Theil-Sen median test and logistic regression models. A low probability of adequate water intake was observed, and this decreased with advancing age. Except among the elderly, among whom no association was observed, a positive association between water intake and the BHEI was observed, and for the total and integral fruit components, which was maintained after confusion adjustments. Among adults, it was observed that those who ingested less water had even lower scores for saturated fats. The residents of São Paulo have low water intake, and the quality of diet is worse among those who drink less water.

O objetivo do presente estudo foi validar a autorreferência de colesterol elevado em residentes de São Paulo, Brasil, e verificar os fatores associados à sensibilidade dessa informação. Foram utilizados dados do Inquérito de Saúde de São Paulo de 2015, estudo transversal de base populacional com amostra probabilística de residentes do município. Foram incluídos 886 indivíduos com informações do questionário estruturado, dosagem de colesterol total e frações ou que referiram tratamento farmacológico do colesterol elevado. A validade da informação autorreferida de colesterol elevado foi determinada por meio da sensibilidade, especificidade, valores preditivos positivo (VPP) e negativo (VPN) e kappa, considerando as dosagens de colesterol total e LDL-c e o tratamento farmacológico como padrão-ouro. Modelos de regressão logística foram realizados a fim de investigar os fatores associados à sensibilidade dessa informação. A sensibilidade da informação de colesterol elevado tendo em conta o colesterol total como referência foi de 50,6%, a especificidade de 90,19%, VPP de 51,64%, VPN de 89,82% e kappa de 0,41. Considerando o LDL-c como padrão-ouro, a sensibilidade foi 53,52%, a especificidade 89,93%, o VPP 49,22%, o VPN 91,39% e kappa 0,43. Utilizando a dosagem de colesterol total como referência, a idade (OR = 1,69; IC95%: 1,24-2,29) e o plano de saúde (OR = 2,91; IC95%: 1,06-7,99) se associaram à sensibilidade dessa informação. Considerando a dosagem de LDL-c como padrão-ouro, a idade (OR = 1,71; IC95%: 1,13-2,57), o tabagismo (OR = 3,33; IC95%: 1,08-10,27) e o plano de saúde (OR = 3,64; IC95%: 1,10-12,08) foram associados à sensibilidade dessa informação. Os resultados indicam baixa sensibilidade e VPP da autorreferência do colesterol elevado em residentes de São Paulo.

The study aimed to validate self-report of high cholesterol in São Paulo, Brazil, and verify factors associated with this information’s sensitivity. Data were used from the Health Survey of the City of São Paulo 2015, a cross-sectional population-based study with a probabilistic sample of the city’s residents. The sample included 886 individuals with information from the structured questionnaire, blood measurements of total cholesterol and fractions or who reported being on medication for high cholesterol. The validity of self-reported information on high cholesterol was measured according to sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and kappa index, considering total cholesterol and LDL-c and pharmacological treatment as the gold standard. Logistic regression models were developed to investigate factors associated with the sensitivity of this information. The sensitivity of information on high cholesterol using total cholesterol as the reference was 50.6%, specificity 90.19%, PPV 51.64%, NPV 89.82%, and kappa 0.41. Taking LDL-c as the gold standard, sensitivity was 53.52%, specificity 89.93%, PPV 49.22%, NPV 91.39%, and kappa 0.43. Using total cholesterol as the reference, age (OR = 1.69; 95%CI: 1.24-2.29) and having a private health plan (OR = 2.91; 95%CI: 1.06-7.99) were associated with the information’s sensitivity. With LDL-c as the gold standard, age (OR = 1.71; 95%CI: 1.13-2.57), smoking (OR = 3.33; 95%CI: 1.08-10.27), and having a private health plan (OR = 3.64; 95%CI: 1.10-12.08) were associated with the information’s sensitivity. The results suggest low sensitivity and low PPV of self-reported high cholesterol in residents of São Paulo.

El objetivo de este estudio fue validar el autoinforme de colesterol elevado en residentes de São Paulo, Brasil, y verificar los factores asociados a la sensibilidad de esta información. Se utilizaron datos de la Encuesta de Salud de São Paulo 2015, estudio transversal de base poblacional con una muestra probabilística de residentes del municipio. Se incluyeron 886 individuos con información del cuestionario estructurado, cantidad de colesterol total y fracciones o que informaron de un tratamiento farmacológico por colesterol elevado. La validez de la información autoinformada de colesterol elevado fue determinada por medio de la sensibilidad, especificidad, valores predictivos positivo (VPP) y negativo (VPN) y kappa, considerando las cantidades de colesterol total y LDL-c y el tratamiento farmacológico como parámetro de referencia. Se realizaron modelos de regresión logística, a fin de investigar los factores asociados a la sensibilidad de esa información. La sensibilidad de la información de colesterol elevado, teniendo en cuenta el colesterol total como referencia, fue de un 50,6%, la especificidad de 90,19%, VPP de 51,64%, VPN de 89,82% y kappa de 0,41. Considerando el LDL-c como parámetro de referencia, la sensibilidad fue 53,52%, la especificidad 89,93%, el VPP 49,22%, el VPN 91,39% y kappa 0,43. Utilizando la cantidad de colesterol total como referencia, la edad (OR = 1,69; IC95%: 1,24-2,29) y el plan de salud (OR = 2,91; IC95%: 1,06-7,99) se asociaron a la sensibilidad de esa información. Considerando la cantidad de LDL-c como parámetro de referencia, la edad (OR = 1,71; IC95%: 1,13-2,57), el tabaquismo (OR = 3,33; IC95%: 1,08-10,27) y el plan de salud (OR = 3,64; IC95%: 1,10-12,08) se asociaron a la sensibilidad de esa información. Los resultados indican baja sensibilidad y VPP del autoinforme de colesterol elevado en residentes de São Paulo.

O objetivo do presente estudo foi validar a autorreferência de colesterol elevado em residentes de São Paulo, Brasil, e verificar os fatores associados à sensibilidade dessa informação. Foram utilizados dados do Inquérito de Saúde de São Paulo de 2015, estudo transversal de base populacional com amostra probabilística de residentes do município. Foram incluídos 886 indivíduos com informações do questionário estruturado, dosagem de colesterol total e frações ou que referiram tratamento farmacológico do colesterol elevado. A validade da informação autorreferida de colesterol elevado foi determinada por meio da sensibilidade, especificidade, valores preditivos positivo (VPP) e negativo (VPN) e kappa, considerando as dosagens de colesterol total e LDL-c e o tratamento farmacológico como padrão-ouro. Modelos de regressão logística foram realizados a fim de investigar os fatores associados à sensibilidade dessa informação. A sensibilidade da informação de colesterol elevado tendo em conta o colesterol total como referência foi de 50,6%, a especificidade de 90,19%, VPP de 51,64%, VPN de 89,82% e kappa de 0,41. Considerando o LDL-c como padrão-ouro, a sensibilidade foi 53,52%, a especificidade 89,93%, o VPP 49,22%, o VPN 91,39% e kappa 0,43. Utilizando a dosagem de colesterol total como referência, a idade (OR = 1,69; IC95%: 1,24-2,29) e o plano de saúde (OR = 2,91; IC95%: 1,06-7,99) se associaram à sensibilidade dessa informação. Considerando a dosagem de LDL-c como padrão-ouro, a idade (OR = 1,71; IC95%: 1,13-2,57), o tabagismo (OR = 3,33; IC95%: 1,08-10,27) e o plano de saúde (OR = 3,64; IC95%: 1,10-12,08) foram associados à sensibilidade dessa informação. Os resultados indicam baixa sensibilidade e VPP da autorreferência do colesterol elevado em residentes de São Paulo.

The study aimed to validate self-report of high cholesterol in São Paulo, Brazil, and verify factors associated with this information’s sensitivity. Data were used from the Health Survey of the City of São Paulo 2015, a cross-sectional population-based study with a probabilistic sample of the city’s residents. The sample included 886 individuals with information from the structured questionnaire, blood measurements of total cholesterol and fractions or who reported being on medication for high cholesterol. The validity of self-reported information on high cholesterol was measured according to sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and kappa index, considering total cholesterol and LDL-c and pharmacological treatment as the gold standard. Logistic regression models were developed to investigate factors associated with the sensitivity of this information. The sensitivity of information on high cholesterol using total cholesterol as the reference was 50.6%, specificity 90.19%, PPV 51.64%, NPV 89.82%, and kappa 0.41. Taking LDL-c as the gold standard, sensitivity was 53.52%, specificity 89.93%, PPV 49.22%, NPV 91.39%, and kappa 0.43. Using total cholesterol as the reference, age (OR = 1.69; 95%CI: 1.24-2.29) and having a private health plan (OR = 2.91; 95%CI: 1.06-7.99) were associated with the information’s sensitivity. With LDL-c as the gold standard, age (OR = 1.71; 95%CI: 1.13-2.57), smoking (OR = 3.33; 95%CI: 1.08-10.27), and having a private health plan (OR = 3.64; 95%CI: 1.10-12.08) were associated with the information’s sensitivity. The results suggest low sensitivity and low PPV of self-reported high cholesterol in residents of São Paulo.

El objetivo de este estudio fue validar el autoinforme de colesterol elevado en residentes de São Paulo, Brasil, y verificar los factores asociados a la sensibilidad de esta información. Se utilizaron datos de la Encuesta de Salud de São Paulo 2015, estudio transversal de base poblacional con una muestra probabilística de residentes del municipio. Se incluyeron 886 individuos con información del cuestionario estructurado, cantidad de colesterol total y fracciones o que informaron de un tratamiento farmacológico por colesterol elevado. La validez de la información autoinformada de colesterol elevado fue determinada por medio de la sensibilidad, especificidad, valores predictivos positivo (VPP) y negativo (VPN) y kappa, considerando las cantidades de colesterol total y LDL-c y el tratamiento farmacológico como parámetro de referencia. Se realizaron modelos de regresión logística, a fin de investigar los factores asociados a la sensibilidad de esa información. La sensibilidad de la información de colesterol elevado, teniendo en cuenta el colesterol total como referencia, fue de un 50,6%, la especificidad de 90,19%, VPP de 51,64%, VPN de 89,82% y kappa de 0,41. Considerando el LDL-c como parámetro de referencia, la sensibilidad fue 53,52%, la especificidad 89,93%, el VPP 49,22%, el VPN 91,39% y kappa 0,43. Utilizando la cantidad de colesterol total como referencia, la edad (OR = 1,69; IC95%: 1,24-2,29) y el plan de salud (OR = 2,91; IC95%: 1,06-7,99) se asociaron a la sensibilidad de esa información. Considerando la cantidad de LDL-c como parámetro de referencia, la edad (OR = 1,71; IC95%: 1,13-2,57), el tabaquismo (OR = 3,33; IC95%: 1,08-10,27) y el plan de salud (OR = 3,64; IC95%: 1,10-12,08) se asociaron a la sensibilidad de esa información. Los resultados indican baja sensibilidad y VPP del autoinforme de colesterol elevado en residentes de São Paulo.

ABSTRACT OBJECTIVE To validate the self-reported diabetes mellitus in adults and older adults living in the city of São Paulo, Brazil. METHODS We have used data of 569 subjects (284 adults and 285 older adults), participants of the population-based cross-sectional study Inquérito de Saúde do Município de São Paulo (Health Survey of São Paulo). Fasting glucose ≥ 7.0 mmol/L (126 mg/dL) and/or use of drugs (oral hypoglycemic and/or insulin) defined the diagnosis of diabetes mellitus. We have validated the self-reported diabetes mellitus by calculating the sensitivity, specificity, positive predictive values, and negative predictive values. We have used Poisson regression with robust variance to verify the factors associated with the sensitivity of the self-reported datum. For all analyses, we have considered the sample design of the study. RESULTS The sensitivity of self-reported diabetes mellitus was 63.8% (95%CI 49.2–76.3), specificity was 99.7% (95%CI 99.1–99.9), positive predictive value was 95.5% (95%CI 84.4–98.8), and negative predictive value was 96.9% (95%CI 94.9–98.2). The correct reporting of diabetes mellitus was more prevalent among older adults (PR = 2.0; 95%CI 1.2–3.5) than among adults. CONCLUSIONS The use of the datum of self-reported diabetes mellitus is valid, especially among older adults living in the city of São Paulo. The results highlight the need to track diabetes mellitus in asymptomatic subjects who have one or more risk factors for it, mainly in the adult population of this city.

ABSTRACT OBJECTIVE To validate the self-reported diabetes mellitus in adults and older adults living in the city of São Paulo, Brazil. METHODS We have used data of 569 subjects (284 adults and 285 older adults), participants of the population-based cross-sectional study Inquérito de Saúde do Município de São Paulo (Health Survey of São Paulo). Fasting glucose ≥ 7.0 mmol/L (126 mg/dL) and/or use of drugs (oral hypoglycemic and/or insulin) defined the diagnosis of diabetes mellitus. We have validated the self-reported diabetes mellitus by calculating the sensitivity, specificity, positive predictive values, and negative predictive values. We have used Poisson regression with robust variance to verify the factors associated with the sensitivity of the self-reported datum. For all analyses, we have considered the sample design of the study. RESULTS The sensitivity of self-reported diabetes mellitus was 63.8% (95%CI 49.2–76.3), specificity was 99.7% (95%CI 99.1–99.9), positive predictive value was 95.5% (95%CI 84.4–98.8), and negative predictive value was 96.9% (95%CI 94.9–98.2). The correct reporting of diabetes mellitus was more prevalent among older adults (PR = 2.0; 95%CI 1.2–3.5) than among adults. CONCLUSIONS The use of the datum of self-reported diabetes mellitus is valid, especially among older adults living in the city of São Paulo. The results highlight the need to track diabetes mellitus in asymptomatic subjects who have one or more risk factors for it, mainly in the adult population of this city.

Introduction: Studies have shown that oxidative stress, found in patients with type 2 diabetes, may be due to changes in the metabolism of minerals, such as magnesium and iron. Data related to compartmentalization of these minerals in diabetes are scarce and controversial. Objective: This study assessed the influence of magnesium on biochemical parameters of iron and oxidative stress in patients with type 2 diabetes. Methods: A case-control study in male and female subjects aged 27-59 years, divided into two groups: type 2 diabetes (n=40) and control (n=48). Intake of magnesium and iron was assessed by three-day food record. Plasma, erythrocyte and urinary levels of magnesium, serum iron, ferritin, total iron binding capacity, fasting glucose, glycated hemoglobin, insulin, creatinine clearance and plasma thiobarbituric acid reactive substances (TBARS) were analyzed. Results and Discussion: Magnesium intake and plasma magnesium were lower in diabetic subjects. There was low urinary magnesium excretion, with no difference between groups. Although normal, the diabetic group had lower serum iron and ferritin concentrations compared to control subjects. Plasma TBARS in diabetic patients was higher than control while creatinine clearance was lower. An inverse correlation between erythrocyte magnesium and serum iron and ferritin was observed in the diabetes group. Conclusions: Diabetes induced hypomagnesemia and this, associated with chronic hyperglycemia, may have enhanced oxidative stress. Erythrocyte magnesium may have contributed to prevent iron overload and worsening of oxidative stress and hyperglycemic status.

Introducción: Los estudios han demostrado que el estrés oxidativo, que se encuentra en pacientes con diabetes tipo 2, puede ser debido a cambios en el metabolismo de los minerales, como el magnesio y el hierro. Los datos relacionados con la compartimentación de estos minerales en la diabetes son pocos y cuestionables. Objetivos: Evaluar la influencia del magnesio sobre parámetros bioquímicos de hierro y el estrés oxidativo en pacientes con diabetes tipo 2. Métodos: Estudio caso-control en los sujetos masculinos y femeninos de edad 27 a 59 años, divididos en dos grupos: la diabetes tipo 2 (n = 40) y control (n = 48). La ingesta de magnesio y hierro se evaluó por tres días registro de alimentos. Plasma, eritrocitos y los niveles urinarios de magnesio, hierro sérico, ferritina, capacidad total de fijación del hierro, glucosa en ayunas, hemoglobina glucosilada, la insulina, el aclaramiento de creatinina y el plasma se analizaron tiobarbitúrico sustancias reactivas al ácido (TBARS). Resultados y Discusión: La ingesta de magnesio y el magnesio en plasma fueron más bajos en los pacientes diabéticos. Hubo baja excreción urinaria de magnesio, sin diferencias entre los grupos. Aunque lo normal, el grupo de diabéticos tenían concentraciones de hierro y ferritina sérica inferiores en comparación con los sujetos control. TBARS plasmáticos en los pacientes diabéticos fue mayor que en el control, mientras que la depuración de creatinina fue menor. Se observó una correlación inversa entre el magnesio y el hierro en suero de los eritrocitos y la ferritina en el grupo de diabetes Conclusiones: Diabetes hipomagnesemia inducida y esto, asociado a la hiperglucemia crónica, pueden haber mejorado el estrés oxidativo. Magnesio eritrocitaria puede haber contribuido a evitar la sobrecarga de hierro y el empeoramiento de estrés oxidativo y el estado de hiperglucemia.

Introduction: Magnesium is an essential micronutrient for human body, and its deficiency has been associated with risk of non-communicable diseases. Objective: Assessment of magnesium status, and evaluation of the frequency of magnesium deficiency in a group of healthy adults. Methods: Plasma and erythrocyte magnesium levels, and magnesium intake were determined in 115 students (55 women and 60 men), from a public university in Brazil. Results: The medians of magnesium concentration in plasma (0.76 mmol/L), erythrocyte (1.97 mmol/L), and of dietary daily intake (8.84 mmol/d) were low. Forty two percent of participants had plasma or erythrocyte magnesium below the limit of 0.75 and 1.65 mmol/L, respectively. A high percentage showed high probability of inadequate magnesium intake. Conclusions: There was a high frequency of subclinical magnesium deficiency in the adults assessed, that could be related to low dietary magnesium intake.

Introducción: El magnesio es esencial, y su deficiencia ha sido asociada a mayor riesgo de enfermedades crónicas. Objetivos: Evaluar el estado de nutrición de magnesio y su ingesta en adultos sanos, y determinar la frecuencia de su deficiencia en esta población. Métodos: Fueron evaluados 115 adultos estudiantes de una universidad pública en Brasil, y se determinó la ingesta dietética y los niveles de magnesio en plasma y eritrocitos. Resultados: Las medianas de distribución de magnesio en plasma (0,76 mmol/L), en eritrocitos (1,97 mmol/L), y la ingesta de magnesio (8,84 mmol/d) fueron bajas. Un 42% de la muestra tuvieron concentración de magnesio en plasma o eritrocitos por debajo de los respectivos 0,75 mmol/L y 1,65 mmol/L. Un alto porcentaje de ellos exhibió probabilidad de ingesta de magnesio inadecuada. Conclusiones: Se observó una alta frecuencia de deficiencia de magnesio subclínica en los adultos evaluados.