Multivariate logistic regression results of STIs regressed on means of meeting sexual partners controlling for demographics and drugs, August 2011—January 2013
| Gonorrhoea (n=6356) | Chlamydia (n=6335) | Syphilis (n=6282) | HIV (n=6569) | |||||
|---|---|---|---|---|---|---|---|---|
| Predictor | p Value | OR (95% CI) | p Value | OR (95% CI) | p Value | OR (95% CI) | p Value | OR (95% CI) |
| Age group (REF=30–39) | p<0.0001 | p=0.007 | p=0.08 | p=0.17 | ||||
| <20 | 0.0015 | 2.00 (1.31 to 3.08) | 0.002 | 1.98 (1.28 to 3.07) | 0.79 | 0.82 (0.19 to 3.59) | 0.73 | 0.87 (0.38 to 1.99) |
| 20–24 | <0.0001 | 1.53 (1.24 to 1.89) | 0.04 | 1.27 (1.01 to 1.59) | 0.83 | 0.93 (0.50 to 1.76) | 0.02 | 0.57 (0.35 to 0.92) |
| 25–29 | 0.0005 | 1.40 (1.16 to 1.69) | 0.16 | 1.16 (0.94 to 1.42) | 0.11 | 0.59 (0.31 to 1.12) | 0.19 | 0.76 (0.51 to 1.15) |
| 40–49 | 0.04 | 0.78 (0.61 to 0.99) | 0.33 | 0.89 (0.70 to 1.13) | 0.23 | 1.41 (0.80 to 2.47) | 0.35 | 0.80 (0.50 to 1.28) |
| 50+ | 0.40 | 0.86 (0.61 to 1.22) | 0.91 | 1.02 (0.72 to 1.44) | 0.07 | 1.96 (0.94 to 4.10) | 0.06 | 0.41 (0.16 to 1.05) |
| Ethnicity (REF=Caucasian) | p=0.1 | p=0.73 | p=0.1 | p=0.0001 | ||||
| Asian/PI | 0.04 | 0.74 (0.56 to 0.98) | 0.32 | 1.15 (0.88 to 1.50) | 0.70 | 0.83 (0.32 to 2.14) | 0.03 | 1.84 (1.06 to 3.20) |
| Black | 0.36 | 1.14 (0.86 to 1.52) | 0.74 | 1.05 (0.77 to 1.45) | 0.31 | 1.54 (0.67 to 3.56) | <0.0001 | 3.22 (1.95 to 5.31) |
| Hispanic | 0.35 | 1.08 (0.92 to 1.28) | 0.42 | 1.08 (0.90 to 1.30) | 0.02 | 1.80 (1.10 to 2.95) | 0.13 | 1.35 (0.91 to 1.99) |
| Other | 0.47 | 1.15 (0.78 to 1.70) | 0.30 | 1.25 (0.83 to 1.88) | 0.11 | 2.21 (0.84 to 5.81) | 0.90 | 0.93 (0.33 to 2.65) |
| Education (REF=college grad) | p=0.1 | p=0.04 | p=0.81 | p<0.0001 | ||||
| <High school | 0.82 | 0.92 (0.45 to 1.89) | 0.68 | 1.17 (0.57 to 2.40) | 0.67 | 1.37 (0.31 to 6.01) | 0.0018 | 4.81 (1.79 to 12.90) |
| Some HS | 0.37 | 1.27 (0.76 to 2.11) | 0.85 | 1.06 (0.59 to 1.92) | 0.95 | 0.95 (0.22 to 4.20) | 0.19 | 2.07 (0.70 to 6.11) |
| HS grad | 0.15 | 1.18 (0.94 to 1.48) | 0.002 | 1.47 (1.16 to 1.86) | 0.73 | 1.12 (0.58 to 2.16) | <0.0001 | 4.30 (2.78 to 6.65) |
| Some college | 0.23 | 1.11 (0.94 to 1.33) | 0.16 | 1.15 (0.95 to 1.39) | 0.39 | 1.24 (0.75 to 2.05) | 0.0002 | 2.19 (1.46 to 3.29) |
| Postgrad | 0.03 | 0.71 (0.52 to 0.97) | 0.54 | 0.91 (0.68 to 1.23) | 0.32 | 0.62 (0.24 to 1.59) | 0.34 | 0.66 (0.28 to 1.55) |
| Drug predictors | ||||||||
| Meth | <0.0001 | 1.84 (1.45 to 2.34) | 0.0004 | 1.59 (1.23 to 2.06) | <0.0001 | 3.53 (2.08 to 5.97) | 0.0007 | 2.13 (1.38 to 3.30) |
| Ecstasy | 0.13 | 1.20 (0.95 to 1.53) | 0.56 | 0.92 (0.70 to 1.21) | 0.48 | 0.75 (0.34 to 1.66) | 0.55 | 1.17 (0.70 to 1.97) |
| Nitrates | 0.08 | 1.18 (0.98 to 1.42) | 0.15 | 1.15 (0.95 to 1.40) | 0.29 | 1.30 (0.80 to 2.13) | 0.03 | 1.50 (1.03 to 2.19) |
| Cocaine | 0.44 | 1.09 (0.88 to 1.36) | 0.03 | 1.29 (1.02 to 1.63) | 0.81 | 0.92 (0.46 to 1.84) | 0.57 | 1.15 (0.72 to 1.83) |
| Means of meeting sex partners | p=0.0004 | p=0.004 | p=0.57 | p=0.26 | ||||
| Internet (REF=in person) | 0.19 | 0.88 (0.73 to 1.06) | 0.21 | 1.14 (0.93 to 1.39) | 0.29 | 1.32 (0.79 to 2.20) | 0.55 | 0.89 (0.61 to 1.30) |
| Phone app (REF=internet) | 0.0001 | 1.42 (1.19 to 1.70) | 0.05 | 1.20 (1.00 to 1.45) | 0.66 | 0.89 (0.54 to 1.48) | 0.31 | 0.81 (0.54 to 1.22) |
| Phone app (REF=in person) | 0.0099 | 1.25 (1.06 to 1.48) | 0.001 | 1.37 (1.13 to 1.65) | 0.55 | 1.18 (0.69 to 2.01) | 0.10 | 0.72 (0.49 to 1.07) |