Validation Study of Self-Reported Anthropometric Indices among the Staff of the Isfahan University of Medical Sciences, Isfahan, Iran

Scarce data are available on validity of self-reported anthropometric indices in Iran. This cross-sectional study aimed to determine the validity of self-reported anthropometric indices in comparison with the same variables measured by technicians in a subgroup of the staff of the Isfahan University of Medical Sciences (IUMS), Isfahan, Iran. In the current study, 200 staff of Isfahan University of Medical Sciences were selected via convenience non-random sampling method. Weight, height, and waist and hip circumferences were questioned by the first technician. The same measures were taken three times by a trained technician according to standard protocols. Mean of three measurements were considered in statistical analysis. Weight (P = 0.040) and waist circumference (P < 0.001) measures were significantly lower in self-reported values compared to those that measured by the technician. Pearson correlation test between the measured and self-reported anthropometric indices ranged from 0.60 for hip circumference to 0.95 for weight. The highest agreement between the two series of values was observed for normal weight (73%) and overweight and obesity (91%). Overall, 87% of central obesity measured by the technician, was confirmed by self-reported measures. While, less than 13% of people with no abdominal obesity, according to the technician measures, were categorized as abdominally obese by self-reported values. These results indicate that self-reported anthropometric indices are highly accurate among this Iranian population, and are, therefore, appropriate for epidemiologic studies.