Accuracy of self-reported anthropometric measures - Findings from the Finnish Twin Study

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Tuomela , J , Kaprio , J , Sipilä , P N , Silventoinen , K , Wang , X , Ollikainen , M & Piirtola , M 2019 , ' Accuracy of self-reported anthropometric measures - Findings from the Finnish Twin Study ' , Obesity Research & Clinical Practice , vol. 13 , no. 6 , pp. 522-528 .

Title: Accuracy of self-reported anthropometric measures - Findings from the Finnish Twin Study
Author: Tuomela, Jenni; Kaprio, Jaakko; Sipilä, Pyry N.; Silventoinen, Karri; Wang, Xin; Ollikainen, Miina; Piirtola, Maarit
Contributor organization: Institute for Molecular Medicine Finland
Centre of Excellence in Complex Disease Genetics
Department of Public Health
Jaakko Kaprio / Principal Investigator
Genetic Epidemiology
Helsinki Inequality Initiative (INEQ)
Population Research Unit (PRU)
University Management
Center for Population, Health and Society
Date: 2019
Language: eng
Number of pages: 7
Belongs to series: Obesity Research & Clinical Practice
ISSN: 1871-403X
Abstract: Objective: To determine the accuracy of self-reported height, weight, body mass index (BMI) and waist circumference (WC) compared to the measured values, and to assess the similarity between self-reported and measured values within dizygotic (DZ) and monozygotic (MZ) twin pairs. Methods: The data on self-reported and measured height, weight and WC values as well as measured hip circumference (HC) were collected from 444 twin individuals (53-67 years old, 60% women). Accuracies between self-reported and measured values were assessed by Pearson's correlation coefficients, Cohen's kappa coefficients and Bland-Altman 95% limits of agreement. Intra-class correlation was used in within-pair analyses. Results: The correlations between self-reported and measured values were high for all variables (r = 0.86-0.98), although the agreement assessed by Bland-Altman 95% limits had relatively wide variation. The degree of overestimating height was similar in both sexes, whereas women tended to underestimate and men overestimate their weight. Cohen's kappa coefficients between self-reported and measured BMI categories were high: 0.71 in men and 0.70 in women. Further, the mean self-reported WC was less than the mean measured WC (difference in men 2.5 cm and women 2.6 cm). The within-pair correlations indicated a tendency of MZ co-twins to report anthropometric measures more similarly than DZ co-twins. Conclusions: Self-reported anthropometric measures are reasonably accurate indicators for obesity in large cohort studies. However, the possibility of more similar reporting among MZ pairs should be taken into account in twin studies exploring the heritability of different phenotypes. (C) 2019 The Authors. Published by Elsevier Ltd on behalf of Asia Oceania Association for the Study of Obesity.
Subject: 3142 Public health care science, environmental and occupational health
Anthropometric measure
Body mass index
Twin study
Waist circumference
Hip circumference
Peer reviewed: Yes
Rights: cc_by_nc_nd
Usage restriction: openAccess
Self-archived version: publishedVersion

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