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J Diabetes Metab Disord. 2016 Jul 9;15:22. doi: 10.1186/s40200-016-0244-8. eCollection 2015.

Concordance between self-reported body mass index with weight perception, self-rated health and appearance satisfaction in people living in Tehran.

Author information

1
Nutritional Sciences, National Nutrition and Food Technology Research Institute, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
2
Department of Anthropology, Faculty of Social Sciences, Tehran University, Tehran, Iran.
3
Department of Community Nutrition, National Nutrition and Food Technology Research Institute, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, No. 7, Hafezi (West Arghavan) St., Farahzadi Blvd., Qods Town, 1981619573 P.O. Box 19395-4741, Tehran Iran.
4
Department of Social Determinants of Health, Research Institute of Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

Abstract

BACKGROUND:

Obesity is investigated as a health concern due to high prevalence in the world. Nowadays, researchers are looking for an indirect method to measure weight and height. Self-reported Body Mass Index (BMI) is ever more served as an alternative method for direct weight and height measurement. Misreporting is a usual concern in self-reported BMI, thus, this study set explored the association and degree of agreement of self-reported BMI with weight perception, Self-Rated Health (SRH), and appearance satisfaction in people living in Tehran, Iran.

METHODS:

722 men and women (268 men and 454 women) aged 30-64 years were selected using Cluster Multi-stage Sampling with the Probability Proportional to Size (PPS) method from each area. The questionnaire included demographic and socioeconomic variables and self-reported weight and height and questions related to weight and health perception, and appearance satisfaction. Independent samples T-test compared the mean of scales and differences in characteristics between BMI categories, analyzed using chi-square test. The Cohen's kappa coefficient examined the association between self-reported BMI and weight perception, SRH, and appearance satisfaction.

RESULTS:

The mean self-reported weight was 80.79 ± 12.87 in men and 68.33 ± 11.53 in women. The results of the agreement analysis for weight perception were Kappa = 0.38 with p < 0.0001 for women and Kappa = 0.23 with p <0.0001 for men. This measure of agreement, while statistically significant, is fair agreement. SRH and appearance satisfaction were not significantly correlated with self-reported BMI.

CONCLUSION:

The measurements of height and weight can cause significant imprecisions in calculation of BMI, which is used as a guide for identifying persons at risk of disease. Direct measurement of height and weight should be performed whenever possible for optimal measurements in clinical practice and clinically oriented researches.

KEYWORDS:

Appearance satisfaction; Body mass index; Self-rated health; Self-reported; Weight perception

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