Heritability and Environmental Correlation of Phase Angle with Anthropometric Measurements: A Twin Study

Daisuke Matsumoto, Fujio Inui, Chika Honda, Rie Tomizawa, Mikio Watanabe, Karri Silventoinen and Norio Sakai
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Daisuke Matsumoto: Department of Physical Therapy, Faculty of Health Sciences, Kio University, 4-2-2 Umaminaka, Koryo-cho, Kitakatsuragi-gun, Nara 635-0832, Japan
Fujio Inui: Health Promotion Center, Kio University, 4-2-2 Umaminaka, Koryo-cho, Kitakatsuragi-gun, Nara 635-0832, Japan
Chika Honda: Center for Twin Research, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
Rie Tomizawa: Center for Twin Research, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
Mikio Watanabe: Center for Twin Research, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
Karri Silventoinen: Center for Twin Research, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan
Norio Sakai: Center for Twin Research, Osaka University Graduate School of Medicine, Suita, Osaka 565-0871, Japan

IJERPH, 2020, vol. 17, issue 21, 1-10

Abstract: Bioelectrical impedance analysis (BIA)-derived phase angle (PhA) is a valuable parameter to assess physical health. However, the genetic and environmental aspects of PhA are not yet well understood. The present study aimed to estimate the heritability of PhA and investigate the relationships between PhA and anthropometric measurements. PhA and skeletal muscle mass index (SMI) were examined using multi-frequency BIA in 168 Japanese twin volunteers (54 males and 114 females; mean age = 61.0 ± 16.5 years). We estimated the narrow-sense heritability of these parameters and the genetic and environmental relationships between them using a genetic twin modeling. For the PhA, 51% (95% confidence interval: 0.33, 0.64) of the variance was explained by additive genetic effects, and 49% (95% confidence interval: 0.36, 0.67) was explained by unique environmental effects. The heritability of PhA was lower than the height, body weight, and body mass index. PhA shared almost no genetic variation with anthropometric measurements and SMI but shared an environmental variation (14%) with SMI. These findings suggest that the genes affecting PhA are different than those affecting anthropometric measurements and SMI. The correlation between PhA and SMI is caused by common environmental factors.

Keywords: phase angle; heritability; twin study; anthropometric measurements (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
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