Table 1 General characteristics of the study population (n = 466)
Variables | N (%) or mean ± SD |
|---|---|
Age, years | 36.53 ± 5.75 |
Nationality, n (%) | |
 Han nationality | 456 (97.94) |
 Other | 10 (2.06) |
Education, n (%) | |
 Primary school and below | 13 (2.72) |
 Junior high school | 67 (14.36) |
 High school | 165 (35.40) |
 College or university degree | 197 (42.33) |
 A master’s degree | 22 (4.70) |
 PhD | 2 (0.50) |