| Demographic Variables | Frequency | Percent (%) |
| Gender |
|
|
| Male (1) | 1419 | 42.2 |
| Female (2) | 1944 | 57.8 |
| Age (year) |
|
|
| 60 - 64 (1) | 848 | 25.2 |
| 65 - 69 (2) | 918 | 27.3 |
| 70 - 74 (3) | 708 | 21.2 |
| 75 - 79 (4) | 538 | 16.0 |
| >80 (5) | 351 | 10.4 |
| Education level |
|
|
| Primary school (1) | 1757 | 52.2 |
| Middle school (2) | 925 | 27.5 |
| Above middle school (3) | 680 | 20.2 |
| Medical insurance |
|
|
| Yes (1) | 3279 | 97.5 |
| None (2) | 84 | 2.5 |
| Family Annual Income (RMB/person) |
|
|
| <10,000 (1) | 148 | 5.1 |
| 10,000 - 20,000 (2) | 807 | 27.8 |
| 20,000 - 30,000 (3) | 879 | 30.3 |
| 30,000 - 40,000 (4) | 560 | 19.3 |
| >40,000 (5) | 510 | 17.6 |
| Chronic diseases |
|
|
| Yes (1) | 2184 | 64.9 |
| No (2) | 1179 | 35.1 |
| Medical treatment time (min) |
|
|
| <5 (1) | 88 | 2.6 |
| 5 - 10 (2) | 2474 | 73.6 |
| >10 (3) | 801 | 23.8 |
| Living |
|
|
| Individual (1) | 419 | 12.5 |
| With spouse (2) | 2175 | 64.7 |
| With children (3) | 315 | 9.4 |
| With spouse and children (4) | 447 | 13.3 |