Associations between nocturnal sleep duration, midday nap duration and body composition among adults in Southwest China

Mengxue Chen; Xiao Zhang; Yi Liang; Hongmei Xue; Yunhui Gong; Jingyuan Xiong; Fang He; Yanfang Yang; Guo Cheng

doi:10.1371/journal.pone.0223665

Associations between nocturnal sleep duration, midday nap duration and body composition among adults in Southwest China

PLoS One. 2019 Oct 16;14(10):e0223665. doi: 10.1371/journal.pone.0223665. eCollection 2019.

Authors

Mengxue Chen¹, Xiao Zhang¹, Yi Liang¹, Hongmei Xue², Yunhui Gong^{3

4}, Jingyuan Xiong¹, Fang He¹, Yanfang Yang¹, Guo Cheng⁵

Affiliations

¹ West China School of Public Health and Healthy Food Evaluation Research Center, Sichuan University, Chengdu, P.R. China.
² College of Public Health, Hebei University, Baoding, P. R. China.
³ Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University) of Ministry of Education, Chengdu, P. R. China.
⁴ Department of Obstetrics and Gynecology, Longquanyi District of Chengdu Maternity & Child Health Care Hospital, Chengdu, P. R. China.
⁵ West China School of Public Health and Healthy Food Evaluation Research Center and State Key Laboratory of Biotherapy and Cancer Center, Sichuan University, Chengdu, P.R. China.

Abstract

Objective: We aim to explore the relationship between nocturnal sleep duration (NSD) and midday nap duration (MND) with body composition among Southwest Chinese adults.

Methods: Data on sleep duration of 3145 adults in Southwest China (59.4% women) were obtained between 2014 and 2015 through questionnaires. Height, weight, and waist circumference (WC) were measured to calculate body composition (body mass index (BMI), percentage of body fat (%BF), and fat mass index (FMI)). Linear regression models were used to assess gender-specific associations between NSD and body composition. The relationship between MND with the odds of overweight and central obesity has been evaluated by logistic regression models.

Results: NSD has the inverse relation with males' BMI, WC, %BF and FMI after adjusting for all covariates (all P <0.0007), exclusive of females' (all P >0.4). After adjustment for potential confounders, compared to the subjects in the no midday nap group, the subjects who napped 0.1-1 hour were independently associated with a less prevalence of overweight in both women (OR: 0.72, 95%CI: 0.55-0.95) and men (OR: 0.71, 95%CI: 0.52-0.98). MND was not associated with central obesity.

Conclusions: Among Southwest Chinese adults, lower NSD might be related to higher BMI, WC, %BF and FMI among men. Additionally, MND is associated with overweight in adults.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Adipose Tissue
Asian People*
Body Composition*
Body Weights and Measures
China
Female
Humans
Male
Middle Aged
Odds Ratio
Public Health Surveillance
Sleep*

Grants and funding

This research was funded by the National Nature Science Foundation of China grant number 81472976, the received author is Guo Cheng. URL: http://chem.nsfc.gov.cn/.