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Revista Brasileira de Epidemiologia

Print version ISSN 1415-790X

Abstract

CARVALHO, Aline Martins de et al. Validation and calibration of self-reported weight and height from individuals in the city of São Paulo. Rev. bras. epidemiol. [online]. 2014, vol.17, n.3, pp.735-746. ISSN 1415-790X.  http://dx.doi.org/10.1590/1809-4503201400030013.

Objective:

To evaluate the validity of self-reported weight and height measurements among residents of São Paulo, as well as the accuracy of these measurements for determining nutritional status, and to present calibration coefficients.

Methods:

A cross-sectional, population-based study was performed with a sample of 299 adolescents, adults and elderly of both genders, in São Paulo in 2008. Bland-Altman difference plot and intraclass correlation were used to determine agreement between measured and self-reported parameters. Sensitivity and specificity were assessed for overweight, and calibration coefficients were estimated for correction of weight, height and body mass index data.

Results:

The intraclass correlation was high between self-reported and measured parameters for weight (r > 0,94) and body mass index (BMI) (r > 0,85). The agreement between measured and self-reported weight, height and BMI was good. Sensibility was > 91% and specificity was > 83%.

Conclusion:

Self-reported weight measurements can substitute measured parameters in this population, in both genders and in the age groups studied. Self-reported height measurements should be used with caution. Calibration coefficients can be used to adjust self-reported measurements.

Keywords : Validation studies; Sensitivity and specificity; Body weight; Body height; Body mass index; Health surveys.

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