Table 1.
Baseline characteristics of participating youths (n = 8,115).
| Variable |
Male (n = 2,427) |
Female (n = 5,688) |
Total (n = 8,115) |
p-value |
|---|---|---|---|---|
| Ethnicity n (%)a | 0.309 | |||
| Han | 2,319 (95.6) | 5,403 (95.0) | 7,722 (95.2) | |
| Minority | 108 (4.4) | 285 (5.0) | 393 (4.8) | |
| Urbanicity n (%)a | 0.040 | |||
| Urban | 1,024 (42.2) | 2,261 (39.8) | 3,285 (40.5) | |
| Non-urban | 1,403 (57.8) | 3,427 (60.2) | 4,830 (59.5) | |
| Region n (%)a | 0.252 | |||
| Northeast | 10 (0.4) | 22 (0.4) | 32 (0.4) | |
| East | 220 (9.1) | 559 (9.8) | 779 (9.6) | |
| West | 2,090 (86.1) | 4,909 (86.3) | 6,999 (86.2) | |
| Central | 93 (3.8) | 176 (3.1) | 269 (3.3) | |
| Hubei | 14 (0.6) | 22 (0.4) | 36 (0.4) | |
| Household income (RMB/year) n (%)a | <0.001 | |||
| <12,000 | 475 (19.6) | 1,040 (18.3) | 1,515 (18.7) | |
| ≥12,000–20,000 | 541 (22.3) | 1,660 (29.2) | 2,201 (27.1) | |
| ≥20,000–60,000 | 643 (26.5) | 1,537 (27.0) | 2,180 (26.9) | |
| ≥60,000–10,0000 | 386 (15.9) | 755 (13.3) | 1,141 (14.1) | |
| ≥100,000–200,000 | 259 (10.7) | 511 (9.0) | 770 (9.5) | |
| ≥200,000 | 123 (5.1) | 185 (3.3) | 308 (3.8) | |
| Major n (%)a | <0.001 | |||
| Medical Science | 555 (22.9) | 2,241 (39.4) | 2,796 (34.5) | |
| Science or Engineering | 1,232 (50.8) | 996 (17.5) | 2,228 (27.5) | |
| Social Science | 640 (26.4) | 2,451 (43.1) | 3,091 (38.1) | |
| Current education n (%)a | <0.001 | |||
| High school | 508 (20.9) | 1,380 (24.3) | 1,888 (23.3) | |
| Undergraduates | 1,861 (76.7) | 4,132 (72.6) | 5,993 (73.9) | |
| Graduates | 58 (2.4) | 176 (3.1) | 234 (2.9) | |
a
Percentage within sex.
χ2 tests were conducted to evaluate the significance of differences in participants' characteristics between sexes.