Table 6 Multiple logistic regression analysis predicting factors associated with risk sexual behaviours among the study participants
Independent variable | Model I | Model II | ||
|---|---|---|---|---|
AOR (95% CI) | P | AOR (95% CI) | P | |
Demographic characteristics | ||||
 Gender | ||||
  Female | 1.00 (ref) | 0.674 | 1.00 (ref) | 0.132 |
  Male | 1.08 (0.75, 1.55) | 0.74 (0.50, 1.10) | ||
 Grade | ||||
  Freshmen | 1.00 (ref) |  | 1.00 (ref) |  |
  Sophomore | 1.56 (1.12, 2.18) | 0.008 | 0.86 (0.59, 1.12) | 0.207 |
  Junior | 1.84 (1.28, 2.65) | 0.001 | 1.02 (0.71, 1.48) | 0.912 |
  Senior | 2.07 (1.38, 3.11) |  < 0.001 | 1.16 (0.76, 1.77) | 0.488 |
 Ethnicity | ||||
  Han | 1.00 (ref) | 0.170 | 1.00 (ref) | 0.147 |
  Minority | 1.34 (0.88, 2.03) | 1.41 (0.89, 2.24) | ||
 Marriage | ||||
  Unmarried | 1.00 (ref) | 0.171 | 1.00 (ref) | 0.134 |
  Married | 0.52 (0.20, 1.33) | 0.51 (0.21, 1.23) | ||
 Monthly income | ||||
  Under 1000 | 1.00 (ref) |  | 1.00 (ref) |  |
  1001 ~ 2000 | 0.79 (0.59, 1.06) | 0.110 | 1.16 (0.86, 1.57) | 0.329 |
  2001 ~ 3000 | 1.10 (0.71, 1.70) | 0.677 | 1.35 (0.83, 2.18) | 0.229 |
  Above 3000 | 4.19 (2.17, 8.11) | < 0.001 | 0.50 (0.28, 0.91) | 0.022 |
 Sexual orientation | ||||
  Heterosexual | 1.00 (ref) |  | 1.00 (ref) |  |
  Homosexual | 3.92 (2.17, 7.06) | < 0.001 | 0.60 (0.32, 1.13) | 0.114 |
  Bisexual | 33.22 (13.11, 84.15) | < 0.001 | 0.27 (0.16, 0.44) | < 0.001 |
Level of HIV-related Knowledge | ||||
 Insufficient (< 6 scores) | 1.00 (ref) | 0.210 | 1.00 (ref) | 0.011 |
 Sufficient (≥ 6 scores) | 0.73 (0.44, 1.20) | 1.93 (1.16, 3.19) | ||
Risk perception of HIV/STDs | ||||
 No | 1.00 (ref) | < 0.001 | 1.00 (ref) | < 0.001 |
 Yes | 0.37 (0.24, 0.56) | 2.19 (1.47, 3.27) | ||
Age of first sexual activity | ||||
 ≤ 18 | 1.00 (ref) | 0.001 | 1.00 (ref) | < 0.001 |
 > 18 | 0.32 (0.25, 0.42) | 2.47 (1.88, 3.24) | ||