ABSTRACT
Objectives@#：We investigated relationship between sleep time and depression in the aged 65 years or older. @*Methods@#：This study was based on the data from seventh Korean National Health and Nutrition Examination Survey (KNHANES). 3,285 people aged 65 years or older were selected as the subjects of this research. The demographic characteristics, sleep time and Patient Health Questinnaire-9 (PHQ-9) were administered for each subjects. Depression was defined as above 10 points of PHQ-9. @*Results@#：All the demographic variables such as age, sex, education, household income, marital status, drinking and smoking except Body Mass Index (BMI) were correlated with the depression. When we corrected the variables, inadequate sleep time groups (less than 6 hours or more than 9 hours) tended to be depressed. @*Conclusions@#：The study results showed the significant correlation between sleep time and depression in the aged 65 years or older. Adequate sleep time is important to prevent the depression of the aged.