表 3. Characteristics of individual-related variables (n=7 822) .
个人层面变量特征（n=7 822）
| Variable | Case | Proportion/
% |
| Self-rated health | ||
| Excellent | 57 | 0.7 |
| Very good | 662 | 8.5 |
| Good | 1 295 | 16.6 |
| Fair | 3 557 | 45.5 |
| Poor | 2 251 | 28.8 |
| Chronic disease | ||
| Yes | 5 268 | 68.1 |
| No | 2 470 | 31.9 |
| Sex | ||
| Male | 3 781 | 48.3 |
| Female | 4 041 | 51.7 |
| Personal education level | ||
| Illiterate | 2 052 | 26.3 |
| Elementary school | 3 006 | 38.5 |
| Middle school | 1 731 | 22.1 |
| High school | 586 | 7.5 |
| Junior college | 353 | 4.5 |
| Bachelor and above | 80 | 1.0 |
| Marital status | ||
| Married | 6 392 | 81.7 |
| Divorced | 208 | 2.7 |
| Widowed | 1 103 | 14.1 |
| Never married | 119 | 1.5 |
| Age | ||
| Middle-aged | 4 059 | 51.9 |
| Older | 3 763 | 48.1 |
| Annual household consumption expenditure | ||
| Low | 2 252 | 28.8 |
| Medium | 3 699 | 47.3 |
| High | 1 871 | 23.9 |
| Urban or rural residents | ||
| Urban | 3 068 | 39.2 |
| Rural | 4 754 | 60.8 |