Validación del peso y la talla autodeclarados en población adolescente

Galán, Iñaki; Gandarillas, Ana; Febrel, C; Meseguer, Carmen M.

doi:10.1016/s0213-9111(01)71611-1

Cited by 21 publications

(18 citation statements)

References 23 publications

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“…However, when the presence of false negatives is not a real problem, such as in long-term surveillance and trend studies, the use of estimated BMI based on reported measures is a less expensive alternative 19 . Specificity was higher for girls (92.7%) compared to boys (80.6%), consistent with other studies 19,20 . The capacity of estimated BMI based on reported measures to diagnose non-obese adolescents was satisfactory, since nine of ten adolescents that were not obese were correctly classified.…”

Section: Discussionsupporting

confidence: 92%

Validity and reliability of self-reported weight and height measures for the diagnoses of adolescent's nutritional status

Enes

Fernandez

Voci

et al. 2009

Rev. bras. epidemiol.

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ResumoObjetivo: Avaliar a validade do peso, estatura e Índice de Massa Corporal (IMC) referidos e sua confiabilidade para o diagnóstico do estado nutricional de adolescentes de Piracicaba. Métodos: Participaram do estudo 360 adolescentes de ambos os sexos, de escolas públicas de Piracicaba, com idade entre 10 e 15 anos. Os adolescentes autorelataram seu peso e estatura, sendo esses valores obtidos por medidas diretas, logo em seguida, pelos entrevistadores. A validade do IMC referido foi calculada segundo índices de sensibilidade, especificidade e valor preditivo positivo (VPP). Avaliou-se a concordância entre as categorias de IMC obtido por meio das medidas referidas e aferidas a partir do coeficiente kappa ponderado, coeficiente de correlação de Lin. e grá-ficos de Bland e Altman e Lin. Resultados: Verificou-se que tanto os meninos quanto as meninas subestimaram o peso (−1,0 meninas e meninos) e a estatura (meninas −1,2 e meninos −0,8) (p < 0,001). Os valores de IMC aferidos e referidos apresentaram uma concordância moderada. A sensibilidade do IMC referido para classificar os indivíduos obesos foi maior para os meninos (87,5%), enquanto a especificidade foi maior para as meninas (92,7%). O VPP foi elevado somente para a classificação da eutrofia. Conclusões: As medidas referidas de peso e estatura de adolescentes não representam medidas vá-lidas e, portanto, não devem ser usadas em substituição aos valores mensurados. Além disso, verificou-se que 10% dos meninos obesos e 40% das meninas obesas poderiam permanecer não identificados utilizando-se as medidas auto-referidas, confirmando a baixa validade das medidas auto-referidas. Palavras AbstractPurpose: To assess the validity and reliability of self-reported height, weight, and Body Mass Index (BMI) to diagnose the nutritional status of adolescents. Methods: The study included 360 public school students of both genders, with ages ranging from 10 to 15 years. Adolescents self-reported their weight and height, and these values were later obtained directly by interviewers. The validity of BMI based on self-reported measures was calculated using sensitivity and specificity indexes, and positive predictive value (PPV). Agreement between self-reported and measured BMI was evaluated using Kappa's weight coefficient, the Lin correlation coefficient, and Bland-Altman and Lin's plots. Results: Both girls and boys underestimated their weight (−1.0 girls and boys) and height (girls − 1.2 and boys − 0.8) (p < 0.001). BMI presented moderate agreement between measured and self-reported values. Sensitivity of estimated BMI based on reported measures to classify obese subjects was higher for boys (87.5%) than it was for girls (60.9%), whereas specificity was higher for girls (92.7%) than it was for boys (80.6%). PPV was high only for classification of normal-weight adolescents. Conclusions: Self-reported measures of weight and height in adolescents do not present valid measures; therefore, they should not be used to replace measured values. Additionally, we observed that 10% ...

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Section: Discussionsupporting

confidence: 92%

Validity and reliability of self-reported weight and height measures for the diagnoses of adolescent's nutritional status

Enes

Fernandez

Voci

et al. 2009

Rev. bras. epidemiol.

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“…The few studies that have considered self-reports by underweight adolescents confirmed the result of this study, i.e. that underweight adolescents tend to over-report their BMI [10,14]. When measured weight status was not included in the linear regression model, body perception was a major predictor of the quality of self-reports.…”

Section: Discussionsupporting

confidence: 78%

Validity and predictors of BMI derived from self-reported height and weight among 11- to 17-year-old German adolescents from the KiGGS study

2011

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BackgroundFor practical and financial reasons, self-reported instead of measured height and weight are often used. The aim of this study is to evaluate the validity of self-reports and to identify potential predictors of the validity of body mass index (BMI) derived from self-reported height and weight.FindingsSelf-reported and measured data were collected from a sub-sample (3,468 adolescents aged 11-17) from the German Health Interview and Examination Survey for Children and Adolescents (KiGGS). BMI was calculated from both reported and measured values, and these were compared in descriptive analyses. Linear regression models with BMI difference (self-reported minus measured) and logistic regression models with weight status misclassifications as dependent variables were calculated.Height was overestimated by 14- to 17-year-olds. Overall, boys and girls under-reported their weight. On average, BMI values calculated from self-reports were lower than those calculated from measured values. This underestimation of BMI led to a bias in the prevalence rates of under- and overweight which was stronger in girls than in boys. Based on self-reports, the prevalence was 9.7% for underweight and 15.1% for overweight. However, according to measured data the corresponding rates were 7.5% and 17.7%, respectively. Linear regression for BMI difference showed significant differences according to measured weight status: BMI was overestimated by underweight adolescents and underestimated by overweight adolescents. When weight status was excluded from the model, body perception was statistically significant: Adolescents who regarded themselves as 'too fat' underestimated their BMI to a greater extent. Symptoms of a potential eating disorder, sexual maturation, socio-economic status (SES), school type, migration background and parental overweight showed no association with the BMI difference, but parental overweight was a consistent predictor of the misclassification of weight status defined by self-reports.ConclusionsThe present findings demonstrate that the observed discrepancy between self-reported and measured height and weight leads to inaccurate estimates of the prevalence of under- and overweight when based on self-reports. The collection of body perception data and parents' height and weight is therefore recommended in addition to self-reports. Use of a correction formula seems reasonable in order to correct for differences between self-reported and measured data.

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“…First, self-reported weight and height were used to determine overweight and obesity, and as is already known, there is a problem with the validity and reliability of these data among adolescents (boys over-report their height, girls under-report their weight, with the consequent result of underestimation of overweight and obesity42). This probably happened in our study, but this would not affect the study of social inequalities, except if under-reporting were differential depending on parents' social class, something that, to our knowledge, has not been studied in Spain.…”

Section: Discussionmentioning

confidence: 99%

Social inequalities in health among adolescents in a large southern European city

Duarte‐Salles

Pasarín

Borrell

et al. 2009

Journal of Epidemiology & Community Health

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Background Numerous health problems are initiated in childhood and adolescence. For example, obesity, which has increased significantly in recent years, often begins in early life. The objective of this study is to describe social inequalities in obesity and other health problems among adolescents, by sex. Methods Data were from a cross-sectional study conducted in a representative sample of 903 adolescents aged 12e16 years old, from secondary schools in Barcelona, Spain. Associations between socioeconomic indicators and health outcomes (perceived health status, and overweight and obesity) were examined through generalised estimating equation models. All analyses were stratified by sex. Results Boys were more likely to report very good perceived health status than girls (64.1% and 46.3%, respectively). Some of the less privileged socioeconomic position indicators were associated with the presence of overweight and obesity (prevalence ratio 2.41 for low family affluence scale in girls), and with a lower probability of reporting very good perceived health status among boys (prevalence ratio 0.75 for primary level of paternal education). Conclusions This study suggests that there are social inequalities in perceived health status, overweight and obesity, measured by different socioeconomic indicators among the adolescent population of Barcelona, and that these inequalities were distributed differently among boys and girls. Gender differences in the impact of socioeconomic variables in health need to be considered in epidemiological and intervention studies.

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Validación del peso y la talla autodeclarados en población adolescente

Cited by 21 publications

References 23 publications

Validity and reliability of self-reported weight and height measures for the diagnoses of adolescent's nutritional status

Validity and reliability of self-reported weight and height measures for the diagnoses of adolescent's nutritional status

Validity and predictors of BMI derived from self-reported height and weight among 11- to 17-year-old German adolescents from the KiGGS study

Social inequalities in health among adolescents in a large southern European city

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