Abstract
Objectives
To determine whether longitudinal trajectories of nighttime sleep duration and daytime
napping duration are related to subsequent multimorbidity risk. To explore whether
daytime napping can compensate for negative effects of short nighttime sleep.
Methods
The current study included 5262 participants from China Health and Retirement Longitudinal
Study. Self-reported nighttime sleep duration and daytime napping duration were collected
from 2011 to 2015. The 4-year sleep duration trajectories were conducted by group-based
trajectory modeling. The 14 medical conditions were defined by self-reported physician
diagnoses. Multimorbidity was diagnosed as participants with 2 or more of the 14 chronic
diseases after 2015. Associations between sleep trajectories and multimorbidity were
assessed by Cox regression models.
Results
During 6.69 years of follow-up, we observed multimorbidity in 785 participants. Three
nighttime sleep duration trajectories and three daytime napping duration trajectories
were identified. Participants with persistent short nighttime sleep duration trajectory
had the higher risk of multimorbidity (hazard ratio = 1.37, 95% confidence interval:
1.06-1.77), compared with those with persistent recommended nighttime sleep duration
trajectory. Participants with persistent short nighttime sleep duration and persistent
seldom daytime napping duration had the highest risk of multimorbidity (hazard ratio = 1.69,
95% confidence interval: 1.16-2.46).
Conclusions
In this study, persistent short nighttime sleep duration trajectory was associated
with subsequent multimorbidity risk. Daytime napping could compensate for the risk
of insufficient night sleep.
Keywords
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Article info
Publication history
Published online: April 18, 2023
Accepted:
February 15,
2023
Received in revised form:
January 14,
2023
Received:
April 26,
2022
Publication stage
In Press Corrected ProofIdentification
Copyright
© 2023 National Sleep Foundation. Published by Elsevier Inc. All rights reserved.
