Table 1 Sociodemographic characteristic among college students who had sex in the last year
Variables | Total (N = 1430) | Condom use group (n = 1170) | Condomless sex group(n = 260) | χ 2 | P Value |
|---|---|---|---|---|---|
Sex | Â | Â | Â | 1.043 | 0.307 |
 Male | 823(57.6) | 666(56.9) | 157(60.4) |  |  |
 Female | 607(42.4) | 504(43.1) | 103(39.6) |  |  |
Age, mean (SDa), y | 20.98(1.43) | 20.96(1.33) | 21.08(1.79) | 1.167 | 0.244 |
Field of major |  |  | 2.128 | < 0.001 | |
 Literature | 584(40.8) | 483(41.3) | 101(38.8) |  |  |
 Science | 452(31.6) | 369(31.5) | 83(31.9) |  |  |
 Art | 364(25.5) | 297(25.4) | 67(25.8) |  |  |
 Medicine | 21(1.5) | 19(1.6) | 2(0.8) |  |  |
 N/A | 9(0.6) | 2(0.2) | 7(2.7) |  |  |
Grade | Â | Â | Â | 0.779 | 0.712 |
 Freshmen | 233(16.3) | 188(16.1) | 45(17.3) |  |  |
 Sophomore | 410(28.7) | 341(29.1) | 69(26.5) |  |  |
 Junior | 508(35.5) | 414(35.4) | 94(36.2) |  |  |
 Senior | 279(19.5) | 227(19.4) | 52(20.0) |  |  |
Residence | Â | Â | Â | 0.016 | 0.899 |
 Urban | 1046(73.1) | 855(73.1) | 191(73.5) |  |  |
 Rural | 384(26.9) | 315(26.9) | 69(26.5) |  |  |
Monthly disposable income, yuan | Â | Â | 2.764 | 0.251 | |
 0~ | 377(26.4) | 301(25.7) | 76(29.2) |  |  |
 2001~ | 868(60.7) | 722(61.7) | 146(56.2) |  |  |
 ≥4000 | 185(12.9) | 147(12.6) | 38(14.6) |  |  |
Resident student | Â | Â | 1.997 | 0.158 | |
 Yes | 1384(96.8) | 1136(97.1) | 248(95.4) |  |  |
 No | 46(3.2) | 34(2.9) | 12(4.6) |  |  |