Table 4.
Baseline characteristics of survivors and respondents who dropped out between 2005 and 2011
| Survivors in 2011 (N = 3731) | Drop-outs between 2005 and 2011 (N = 7113) | p-value1 | |
|---|---|---|---|
| % or mean (s.d.) | % or mean (s.d.) | ||
| Playing cards/mahjong | 0.7 (1.3) | 0.6 (1.2) | < 0.001 |
| Organized social activities | 0.43 (1.0) | 0.4 (0.9) | 0.003 |
| Paid job | 0.02 | ||
| Yes | 6.6 | 5.6 | |
| No | 93.4 | 94.4 | |
| Number of siblings frequently visited | 0.9 (1.3) | 0.5 (1.1) | < 0.001 |
| Gender | 0.97 | ||
| Female | 52.3 | 52.3 | |
| Male | 47.7 | 47.7 | |
| Age | < 0.001 | ||
| 65–69 | 25.6 | 9.0 | |
| 70–74 | 21.9 | 10.0 | |
| 75–79 | 18.0 | 11.2 | |
| 80–84 | 11.3 | 9.6 | |
| 85–89 | 12.2 | 19.6 | |
| 90 + | 11.1 | 40.6 | |
| Residence | < 0.001 | ||
| Rural | 61.3 | 55.6 | |
| Urban | 38.7 | 44.4 | |
| Education | < 0.001 | ||
| Illiterate | 52.1 | 58.2 | |
| Literate | 47.9 | 41.8 | |
| Marital status | < 0.001 | ||
| Unmarried | 46.2 | 67.5 | |
| Married | 53.8 | 32.5 | |
| Self-perceived economic conditions | 0.13 | ||
| Poor | 14.9 | 16.0 | |
| Fair | 68.8 | 67.0 | |
| Good | 16.3 | 17.0 | |
| Number of living children | 3.9 (1.8) | 3.5 (1.9) | < 0.001 |
| Number of chronic diseases | 1.2 (1.3) | 1.2 (1.3) | 0.68 |
| Physical exercise | 0.14 | ||
| No | 62.5 | 63.9 | |
| Yes | 37.5 | 36.1 | |
| Cognitive ability index | 20.6 (3.4) | 18.8 (5.0) | < 0.001 |
| Positive emotion index | 11.6 (2.3) | 11.3 (2.4) | < 0.001 |
1Significant difference in baseline characteristics between survivors in 2011 and those who dropped out between 2005 and 2011 was estimated using the Pearson χ2 test for categorical variables and the T test for continuous variables