中国10个地区成年人午睡行为特征及其与慢性病的相关性分析

目的 描述中国慢性病前瞻性研究（CKB）10个地区人群午睡行为的分布特征，探索我国成年人午睡习惯与主要慢性病的关系。方法 剔除基线调查时自报患有肿瘤的个体后，采用logistic回归描述调查对象午睡习惯的地区和年龄分布，分析午睡习惯与糖尿病、高血压、冠心病、脑卒中、慢性阻塞性肺疾病和慢性肝病的相关性。结果 共纳入510 145名研究对象，其中39.9%有夏季午睡习惯，20.8%有常年午睡习惯。夏季午睡和常年午睡的分布存在城乡差异，农村地区及苏州市项目点以夏季午睡为主，比例在32.9%~73.3%之间；海口市和柳州市常年午睡率较高，分别为60.4%和63.3%。常年午睡比例随年龄增加而增加（趋势P<0.001），以70岁组最高（31.9%）。夏季午睡与患糖尿病、高血压、冠心病及慢性肝病呈正相关，OR值（95%CI）分别为1.10（1.07~1.14）、1.03（1.02~1.05）、1.07（1.02~1.12）和1.07（1.00~1.14），常年午睡与糖尿病、高血压、冠心病、脑卒中、慢性阻塞性肺疾病及慢性肝病均呈正相关，OR值（95%CI）分别为1.33（1.29~1.37）、1.11（1.09~1.13）、1.39（1.33~1.45）、1.33（1.26~1.41）、1.12（1.08~1.16）和1.27（1.18~1.37）。结论 CKB项目的人群在午睡习惯上存在地区及年龄差异，午睡与主要慢性疾病呈正相关，且常年午睡与慢性病相关性更高。

Characteristics of daytime napping and its correlation with chronic diseases in Chinese adults

Objective To describe the prevalence of daytime nap habit in participants of the China Kadoorie Biobank (CKB) study, across 10 study regions and explore its correlation with prevalence of major chronic diseases. Methods Participants with a self-reported pre-diagnosis of any cancer at baseline survey were excluded. Logistic regression models were used to analyze the differences in study regions and age distribution of the prevalence daytime nap habit, and its correlation with the prevalence of diabetes, hypertension, coronary heart disease (CHD), stroke, chronic obstructive pulmonary disease (COPD), and chronic liver diseases. Results Among 510 145 participants, 39.9% had daytime nap habit in summer and 20.8% had daytime nap habit all the year round. Urban-rural differences were observed in the prevalence of summer nap habit and perennial nap habit. Daytime nap in summer was common in rural areas and Suzhou, with prevalence ranged from 32.9% to 73.3%. Haikou and Liuzhou had higher prevalence of perennial nap (60.4% and 63.3%). The proportion of people with daytime nap habit all the year round increased with age (P for trend <0.001), the proportion was highest in those aged 70- years (31.9%). Daytime nap habit in summer was positively correlated with the prevalence of diabetes, hypertension, CHD and chronic liver disease with OR of 1.10 (95%CI: 1.07-1.14), 1.03 (95%CI:1.02-1.05), 1.07 (95%CI: 1.02-1.12) and 1.07 (95%CI:1.00-1.14), respectively. Daytime nap habit all the year round was positively correlated with the prevalence of diabetes, hypertension, CHD, stroke, COPD and chronic liver disease with OR of 1.33 (95%CI: 1.29-1.37), 1.11 (95%CI: 1.09-1.13), 1.39 (95%CI: 1.33-1.45), 1.33 (95%CI: 1.26-1.41), 1.12 (95%CI: 1.08-1.16) and 1.27 (95%CI:1.18-1.37) respectively. Conclusion There were regional and age differences in prevalence of daytime nap habit among CKB participants. Daytime nap habit, especially daytime nap habit all the year round, was positively correlated with the prevalence of major chronic diseases.