Midday Napping, Nighttime Sleep, and Mortality: Prospective Cohort Evidence in China / 生物医学与环境科学（英文）

OBJECTIVE@#In developed countries, midday napping and nighttime sleep duration have been linked to long-term survival; however, little is known about such effects in less developed regions. Therefore, this study aimed to assess the associations of midday napping and nocturnal sleep with mortality in middle-aged and older Chinese adults.@*METHODS@#A nationwide cohort of 15,524 adults aged ≥ 45 years was enrolled from 28 provincial regions across mainland China and followed up from 2011 to 2018, using data from the Chinese Health and Retirement Longitudinal Study. Midday napping and nighttime sleep duration were assessed using standardized questionnaires. Cox proportional hazards models with random intercepts for the surveyed provinces were used to estimate hazard ratios ( HRs) of all-cause mortality, adjusting for sociodemographic characteristics, behavioral factors, and health status.@*RESULTS@#A total of 1,745 deaths occurred during a median follow-up of 7.1 years, and the mean (standard deviation) age was 59 (10.1) years at baseline. Compared with non-nappers, over 60 min nappers had a higher risk of all-cause mortality [ HR: 1.35, 95% confidence interval ( CI): 1.17-1.56], while no significant associations were observed among < 30 min nappers. Compared with sleep duration of 6-8 h/night, both short (< 6 h) and long (≥ 8 h) sleep duration were significantly associated with increased mortality, with corresponding HR (95% CI) estimates of 1.21 (1.05-1.38) and 1.26 (1.10-1.44), respectively. We observed significant patterns for greater risks associated with longer nap duration, with a P trend value < 0.001 for all-cause mortality. No significant evidence of an additive interaction was identified between midday napping and nighttime sleep.@*CONCLUSION@#Long midday napping and inappropriate nighttime sleep were independently associated with an increased risk of all-cause mortality in middle-aged and older Chinese populations. Biological studies are needed to validate our findings and clarify the mechanisms underlying this association.

Multimorbidity status of the elderly in China-research based on CHARLS data / 中华疾病控制杂志

Objective To invistigate the prevalence of chronic diseases, the conditions and patterns of multimorbidity in elderly people of China. Methods A total of 11 698 samples aged over 60 years were selected from 2015 data of china health and retirement longitudinal study(CHARLS) for descriptive statistics analysis of chronic disease and multimorbidity status. Results The prevalence of chronic diseases was 69.13%. Top three diseases of prevalence were arthritis or rheumatism (38.50%), hypertension (26.42%), stomach or Gastrointestinal system diseases (24.53%). The prevalence of multimorbidity was 43.65%, and top three diseases of multimorbidity were arthritis or rheumatism (28.78%), hypertension (21.29%), stomach or digestive system disease (20.01% ); Common dual disease combinations were gastric or digestive tract disease+arthritis or rheumatism, hypertension + arthritis or rheumatism, chronic lung disease + arthritis or rheumatism; common three disease combinations were hypertension+stomach or digestive tract disease + arthritis or rheumatism, stomach or digestive system disease + chronic lung disease + arthritis or rheumatism, hypertension+heart disease+joints inflammation or rheumatism. Conclusions The prevalence of chronic diseases and multimorbidity among elderly people are high in China and conditions of chronic diseases and multimorbidity are not optimistic. The health administrative department should raise awareness of management in chronic diseases and multimorbidity, and take actions to improve the health status of the elderly.

The association between depressive symptoms and fall accidents among middle-aged and elderly people in China

BACKGROUND@#Depressive symptoms are a worldwide health problem. However, the research about the effect of depressive symptoms on the fall among the Chinese mid-aged and elderly people is lacking. Therefore, this study aims to investigate the association between depressive symptoms and fall accidents among middle-aged and elderly people in China.@*METHODS@#This study was conducted based on 12,527 sets of data from China Health and Retirement Longitudinal Survey (CHARLS). The 2011 depressive symptoms data and the 2013 fall data were chosen for this study. The depressive symptom-related data was assessed by the Chinese version of Center for Epidemiologic Studies Depression scales (CES-D). Individuals were divided into subgroups according to gender (male or female), age (45-59, middle-aged or ≥ 60, elderly people), and residence (rural or urban). The odds ratios (ORs) were compared between subgroups using multivariable logistic regression analysis method.@*RESULTS@#The adjusted OR value (OR = 1.19 [95% CI 1.07-1.33]) shows there is a significant association between depressive symptoms and subsequent fall accidents. The ORs of the female, elderly people, rural, and urban subgroups are 1.31 (95% CI 1.11-1.55), 1.24 (95% CI 1.08-1.43), 1.17 (95% CI 1.02-1.33), and 1.25 (95% CI 1.04-1.49), respectively, which reveals that this association is also statistically significant in these subgroups.@*CONCLUSIONS@#This study shows that there is a significant association between depressive symptoms and their subsequent fall accidents among the Chinese middle-aged and elderly people.