Association Between Sleep Duration And Cognitive Impairment In Community Elderly Adults

ObjectiveTo study the correlation between habitual sleep time and cognitive dysfunction in community elderly residents.MethodsA total of 1539 Xinglongzhuang Coal Mine Community-dwelling elderly people aged?60 years old from June 2010 to July 2011 were selected and their baseline data were collected.According to the duration of sleep,they were divided into 3 groups,?8 hours sleep duration group,7 hours group,?6 hours sleep duration group and their cognitive function was assessed according to the MMSE score.ResultsThe MMSE score was the highest in 7 hours of sleep per day.Compared with the 7-hour sleep group,the education lever,the percentage of women,the physical exercise were significantly lower in both the other groups.But,the prevalence of diabetes was significantly higher.More than 8 hours,smoking and drinking were higher than the other two groups.After adjusting for confounding factors,?6 hours of sleep duration was a risk factor for cognitive impairment in the elderly(95% CI 1.17-8.38.13).ConclusionInappropriate sleep is a risk factor for cognitive dysfunction in the elderly people in rural China,and early intervention in sleep may reduce cognitive impairment.