Table 1.
Participant’s demographic characteristics (n=3535)
| Characteristic | N | % |
| Gender | ||
| Man | 2772 | 47.77 |
| Woman | 3031 | 52.23 |
| Married status | ||
| Unmarried | 1556 | 26.81 |
| Married | 3829 | 65.98 |
| Divorced or widows | 386 | 6.65 |
| Information missing | 32 | 0.55 |
| Per capita monthly household income (RMB) | ||
| <5000 | 3320 | 57.21 |
| >=5000 | 2419 | 41.69 |
| Information missing | 64 | 1.10 |
| Highest education level | ||
| Compulsory school (through grade 9) | 1343 | 23.14 |
| High school graduation | 1298 | 22.37 |
| Junior college degree | 1374 | 23.68 |
| University degree and above | 1786 | 30.78 |
| Information missing | 2 | 0.03 |