Table 1 Coding of variables
Variable | Coding |
|---|---|
Depression | < 10 = 0, ≥10 = 1 |
Levels of depression | 0 ~ 30 |
WeChat usage | Not using the WeChat =0, Using the WeChat =1 |
Social participation | No = 0, Yes = 1 |
Levels of social participation | 0 ~ 10 |
Voluntary activities | No = 0, Yes = 1 |
Levels of voluntary activities | No = 0, One kind = 1, Two kinds = 2, Three kinds = 3 |
Recreation | No = 0, Yes = 1 |
Levels of recreation | No = 0, One kind = 1, Two kinds = 2, Three kinds = 3 |
Cultural activities | No = 0, Yes = 1 |
Levels of cultural activities | No = 0, One kind = 1, Two kinds = 2 |
Other activities | No = 0, Yes = 1 |
Levels of other activities | No = 0, One kind = 1, Two kinds = 2 |
Age | ≥45 |
Gender | Female = 0, Male =1 |
Marital status | Unmarried = 0, Married = 1 |
Residence | Rural = 1, Urban = 2 |
Education | No formal education = 1, Elementary school = 2, Middle school = 3, High school = 4, College or above = 5 |
Self-reported health | Very poor = 1, Poor = 2, Fair = 3, Good = 4, Very good = 5 |
ADL | No impaired = 0, Impaired = 1 |
Smoke status | Still have = 1, Quit = 2, No = 3 |
Drink status | No = 0, Yes = 1 |
Sleep time | Take the log of sleep time |
Employment | No = 0, Yes = 1 |
Pension insurance | No = 0, Yes = 1 |
Medical insurance | No = 0, Yes = 1 |
Chronic diseases | No = 0, One kind = 1, Two kinds = 2, Three kinds = 3, Four kinds and more = 4 |