Wang Lu, Wang Yiting, Shu Hainan, Wang Kai, Wang Yaru, Zhou Peixuan, Wang Ke, Luo Siqi, Zhang Yunquan
Department of Nursing, Medical College, Wuhan University of Science and Technology, Wuhan, China.
Department of Epidemiology and Biostatistics, School of Public Health, Wuhan University of Science and Technology, Wuhan, China.
Behav Med. 2023 Oct-Dec;49(4):321-330. doi: 10.1080/08964289.2022.2061411. Epub 2022 Apr 22.
This study aimed to investigate the longitudinal association of estimated daytime nap duration with all-cause mortality in Chinese adults. We conceived a prospective cohort design using adult survey data of the baseline and four follow-up waves (2010-2019) from China Family Panel Studies. Cox frailty models with random intercepts for surveyed provinces were used to estimate risks of all-cause mortality associated with midday napping. Trend and subgroup analyses were also performed stratified by demographic, regional and behavioral factors. Compared with non-nappers, those who reported a long napping duration (≥60 min/day) had an increased risk of all-cause mortality, while shorter napping (<60 min) showed no association with mortality. We observed significant trends for greater risks of mortality associated with longer nap duration. Long nap-associated higher risk of all-cause mortality was seen in a group of nocturnal sleep duration ≥9 h. We identified stronger associations of long nap with mortality among adults aged over 50 years, those with lower BMI (<24 kg/m), residents in rural regions and unregular exercisers. Long midday napping is independently associated with higher risks of all-cause mortality in Chinese adults.
本研究旨在探讨中国成年人估计的日间午睡时长与全因死亡率之间的纵向关联。我们采用了前瞻性队列设计，使用了中国家庭追踪调查的基线及四轮随访（2010 - 2019年）的成年人调查数据。采用带有调查省份随机截距的Cox脆弱模型来估计与午睡相关的全因死亡风险。还按人口统计学、地区和行为因素进行了分层的趋势分析和亚组分析。与不午睡者相比，报告午睡时间长（≥60分钟/天）的人全因死亡风险增加，而午睡时间短（<60分钟）与死亡率无关联。我们观察到与较长午睡时长相关的死亡风险有显著趋势。在夜间睡眠时间≥9小时的人群中，观察到较长午睡与全因死亡风险较高有关。我们发现，在50岁以上的成年人、体重指数较低（<24 kg/m²）的人、农村地区居民和不经常锻炼的人中，较长午睡与死亡率的关联更强。长时间午睡与中国成年人较高的全因死亡风险独立相关。
