Table 1

Demographic characteristics of the participants (n=4801)

Total, n (%)Men, n (%)Women, n (%)χ2 P values
Age in years
 15~24546 (11.4)212 (10.9)334 (11.7)10.5<0.01
 25~442064 (43.0)788 (40.6)1276 (44.6)
 45~652191 (45.6)940 (48.5)1251 (43.7)
Residence
 Urban1430 (29.8)557 (28.7)873 (30.5)1.80.18
 Rural3371 (70.2)1383 (71.3)1988 (69.5)
Ethnicity
 Han2939 (61.2)1205 (62.1)1734 (60.6)1.10.29
 Minority1862 (38.8)735 (37.9)1127 (39.4)
Household income (¥)
 <50001353 (29.5)547 (29.4)806 (29.6)0.040.98
 5000~19 9992662 (58.1)1082 (58.1)1581 (58.1)
 ≥20 000567 (12.4)232 (12.5)335 (12.3)
Educational attainment
 Primary school or less2510 (52.3)899 (46.3)1611 (56.3)47.4<0.01
 Secondary school1534 (32.0)710 (36.6)824 (28.8)
 High school or more757 (15.7)331 (17.1)426 (14.9)
Total4801 (100.0)1940 (40.4)2861 (59.6)