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Demographic information for respondents
| Variable | n (%) |
|---|---|
| Gender | |
| Male | 493(48.90) |
| Female | 516(51.10) |
| Age, y, mean±SD | 39.5±16.010 |
| ~25 | 235(23.20) |
| 26~35 | 202(20.00) |
| 36~45 | 231(22.90) |
| 46~55 | 147(14.60) |
| 56~65 | 125(12.40) |
| 66~ | 69(6.80) |
| Educational degree | |
| Primary school | 138(13.70) |
| Middle school | 261(25.90) |
| High school | 233(23.10) |
| College | 156(15.50) |
| University | 221(21.90) |
| Residence | |
| Downtown Chengdu | 358(35.50) |
| Suburb Chengdu | 259(25.70) |
| Other cities of Sichuan Province | 343(34.00) |
| Other provinces | 49(4.90) |
