Socio-demographics | Non-PSU: \( \overline{\mathrm{X}} \) ±SD; n (%) | PSU: \( \overline{\mathrm{X}} \) ±SD; n (%) | Multiple comparisons | Test value: t;X2 | p |
---|---|---|---|---|---|
Age | 20.66 ± 1.575 | 20.62 ± 1.407 |  | 0.39 | 0.700 |
Gender | Â | Â | Â | 0.067 | 0.795 |
 Female | 452 (54.1) | 120 (53.1) |  |  |  |
 Male | 384 (45.9) | 106 (46.9) |  |  |  |
Grade | Â | Â | Â | 7.385 | 0.117 |
 1 | 178 (21.3) | 50 (22.1) |  |  |  |
 2 | 221 (26.4) | 74 (32.8) |  |  |  |
 3 | 235 (28.1) | 57 (25.2) |  |  |  |
 4 | 167 (20) | 42 (18.6) |  |  |  |
 5 (medical major only) | 35 (4.2) | 3 (1.3) |  |  |  |
Residential area | Â | Â | Â | 0.204 | 0.652 |
 Rural | 452 (54.1) | 126 (55.8) |  |  |  |
 Urban | 384 (45.9) | 100 (44.2) |  |  |  |
Family type 1 | Â | Â | Â | 0.016 | 0.899 |
 Single parent | 65 (7.8) | 17 (7.5) |  |  |  |
 Non-single parent | 771 (92.2) | 209 (92.5) |  |  |  |
Family type 2 | Â | Â | Â | 0.227 | 0.634 |
 One child | 329 (39.4) | 85 (37.6) |  |  |  |
 Non-one child | 507 (60.6) | 141 (62.4) |  |  |  |
Science-humanities division (in high school) | Â | Â | 1-2 | 11.652 | 0.001 |
 Science (1) | 632 (75.8) | 145 (64.4) |  |  |  |
 Humanities (2) | 202 (24.2) | 80 (35.6) |  |  |  |
 Non-division | 2 (-) | 1 (-) |  |  |  |
Monthly income from family | Â | Â | Â | 11.058 | 0.004 |
  ≤ 1000 RMB (1) | 425 (50.8) | 122 (54.0) | 1–2 | 4.216 | 0.040 |
 1000–1500 RMB (2) | 321 (38.4) | 65 (28.8) | 1–3 | 3.617 | 0.057 |
  ≥ 1500 (3) | 90 (10.8) | 39 (17.2) | 2–3 | 10.762 | 0.001 |
Total | 836 | 226 | Â | Â | Â |