The Association between Sleep and Bone Mineral Density: Cross‐Sectional Study Using Health Check‐up Data in a Local Hospital in Japan

Author:

Yamaura Reiko1ORCID,Kasahara Hideko2,Iimuro Satoshi3,Yamazaki Tsutomu1ORCID

Affiliation:

1. Graduate School of Medicine International University of Health and Welfare Tokyo Japan

2. International University of Health and Welfare School of Medicine Narita Japan

3. Innovation and Research Support Center International University of Health and Welfare Tokyo Japan

Abstract

ABSTRACTThis study aimed to investigate the association between daily sleep duration of <7 hours and lower bone mineral density (BMD) using data from annual health check‐ups conducted in Japan between 2020 and 2022. Multivariate regression models were used, where BMD was the objective variable and daily sleep duration (<5 hours, 5 to <7 hours, 7 to <9 hours [reference], ≥9 hours) was the exposure variable adjusted for age, body mass index, physical activity, smoking status, and alcohol intake for men and women and further adjusted for menopausal status for women. The association between insomnia and BMD was also investigated. BMD was determined using calcaneal quantitative ultrasound and expressed as a percentage of the young adult mean (%YAM). In total, 896 men and 821 women were included. Median age was 54 years (interquartile range [IQR]: 46 to 64) for men and 55 years (IQR: 46 to 64) for women). Median BMD for men and women was 79%YAM (IQR: 71 to 89) and 75%YAM (IQR: 68 to 84), respectively. Approximately 80% of men and women slept <7 hours daily. Multivariate regression showed no association between sleep duration and BMD in men. However, women who slept 5 to <7 hours daily had significantly higher BMD by 3.9% compared with those who slept 7 to<9 hours (p = 0.004). No association between insomnia and BMD was found. Overall, a daily sleep duration of <7 hours was not independently associated with lower BMD compared to those who slept 7 to <9 hours in men and women. However, as there is evidence of both shorter and longer sleep durations being associated with an increased risk of adverse events, including cardiovascular events, our result needs to be interpreted with caution. © 2023 The Authors. JBMR Plus published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research.

Publisher

Oxford University Press (OUP)

Subject

Orthopedics and Sports Medicine,Endocrinology, Diabetes and Metabolism

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