Testosterone concentrations in young healthy us versus Chinese men
Article first published online: 19 NOV 2013
Copyright © 2013 Wiley Periodicals, Inc.
American Journal of Human Biology
Volume 26, Issue 1, pages 99–102, January/February 2014
How to Cite
Xu, L., Au Yeung, S.L., Kavikondala, S., Leung, G.M. and Schooling, C.M. (2014), Testosterone concentrations in young healthy us versus Chinese men. Am. J. Hum. Biol., 26: 99–102. doi: 10.1002/ajhb.22482
- Issue published online: 20 DEC 2013
- Article first published online: 19 NOV 2013
- Manuscript Accepted: 26 OCT 2013
- Manuscript Revised: 24 OCT 2013
- Manuscript Received: 16 SEP 2013
- Research Grant Council General Research Fund. Grant Number: 769710
- Research Grant Council of Hong Kong, Hong Kong SAR, People's Republic of China
Previous small studies examining differences in testosterone concentrations by ethnicity found mixed results for Caucasians and Chinese men, which might be confounded by age differences and living standards. The aim of the present study is to examine the differences in total, free, and bioavailable testosterone concentrations between healthy young men from the United States (US) and from the most economically developed part of China, i.e., Hong Kong (HK).
Cross-sectional analysis based on 365 young men from the Third National Health and Nutrition examination Survey (NHANES III) in the US and 299 Chinese men recruited from university students. All participants were aged from 18 to 29 years. Main outcome measures were total testosterone (TT) and calculated bioavailable testosterone (Bio T) and free testosterone (FT).
In both US and Chinese men, TT, FT, and Bio T concentration peaked at 20–24 years of age, at 23.19, 0.49, and 12.23 nmol/l in US men, and 20.72, 0.48 and 12.59 nmol/l in Chinese men, respectively. Among those aged 18–24 years, after adjusting for age, US men had higher TT (mean, 95% confidence interval: 21.64, 21.31–21.99 versus 20.20, 20.12–20.28 nmol/l), but not FT (0.47, 0.47–0.48 versus 0.47, 0.47–0.47 nmol/l) or Bio T (11.90, 11.83–11.97 versus 12.39, 12.35–12.42 nmol/l) than Chinese men.
TT, but not FT or Bio T concentrations are lower in young healthy Chinese men than US men. These differences apparent in young men may be important in understanding different patterns of diseases between Western and Asian populations. Am. J. Hum. Biol. 26:99–102, 2014. © 2013 Wiley Periodicals, Inc.