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Daily sleep duration and the risk of incident disability among younger elderly Japanese adults in the New Integrated Suburban Seniority Investigation Project : A prospective study using competing event analysis

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Title: Daily sleep duration and the risk of incident disability among younger elderly Japanese adults in the New Integrated Suburban Seniority Investigation Project : A prospective study using competing event analysis
Authors: Zhang, Lin Browse this author
Ukawa, Shigekazu Browse this author →KAKEN DB
Zhao, Wenjing Browse this author
Okabayashi, Satoe Browse this author →KAKEN DB
Ando, Masahiko Browse this author →KAKEN DB
Wakai, Kenji Browse this author →KAKEN DB
Tsushita, Kazuyo Browse this author
Kawamura, Takashi Browse this author →KAKEN DB
Tamakoshi, Akiko Browse this author →KAKEN DB
Keywords: disability
prospective cohort study
sleep duration
Issue Date: 6-Sep-2019
Publisher: John Wiley & Sons
Journal Title: Geriatrics & gerontology international
Volume: 19
Issue: 9
Start Page: 945
End Page: 949
Publisher DOI: 10.1111/ggi.13732
PMID: 31332921
Abstract: Aim This study aimed to investigate the association between daily sleep duration and incident disability among younger elderly individuals in Japan. Methods We carried out a prospective cohort study, the New Integrated Suburban Seniority Investigation Project, including 1895 (962 men and 933 women) Japanese physically and socially independent individuals aged >= 65 years. Information on daily sleep duration, demographic, lifestyle characteristics and medical status were collected by questionnaire and health checkup every year from 1996 through 2005. Dates of incident disability were confirmed using the certification for the long-term care insurance in Japan. We treated censored cases due to death as competing events. A competing risk model was used to calculate the hazard ratio and 95% confidence interval for incident disability. Results During a median of 12.7 years of follow up, 256 participants (114 men and 142 women) reported incident disability. Compared with a sleep duration of 7-7.9 h/day, sleeping <6 h/day showed an increased risk of incident disability (hazard ratio 1.64, 95% confidence interval 1.13-2.38 for total; hazard ratio 1.90, 95% confidence interval 1.19-3.03 for women). Conclusions The present findings suggest that shorter sleep duration was associated with a higher risk of incident disability among older Japanese people. Geriatr Gerontol Int 2019; center dot center dot: center dot center dot-center dot center dot.
Rights: This is the peer reviewed version of the following article: Lin Zhang Shigekazu Ukawa Wenjing Zhao Satoe Okabayashi Masahiko Ando Kenji Wakai Kazuyo Tsushita Takashi Kawamura Akiko Tamakoshi (2019) Geriatrics & gerontology international: 19(9): 945-949, which has been published in final form at https://doi.org/10.1111/ggi.13732. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Type: article (author version)
URI: http://hdl.handle.net/2115/79225
Appears in Collections:医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 玉腰 暁子

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