Univariate logistic regressions: factors associated with STI, among FSW aged 18 years and older, Tijuana, BC
| Any STI | HIV | Syphilis titre ⩾1 : 8 | Gonorrhoea | Chlamydia | |
| UOR (95% CI) | UOR (95% CI) | UOR (95% CI) | UOR (95% CI) | UOR (95% CI) | |
| Individual traits | |||||
| Migrant to BC | 0.61** (0.39 to 0.97) | 0.58 (0.27 to 1.22) | 0.68 (0.38 to 1.24) | 0.57 (0.28 to 1.15) | 0.83 (0.47 to 1.47) |
| Age 35–64 years | 0.68* (0.45 to 1.03) | 0.89 (0.43 to 1.81) | 0.95 (0.55 to 1.63) | 0.86 (0.44 to 1.67) | 0.51** (0.30 to 0.88) |
| Has spouse/steady partner | 1.23 (0.82 to 1.86) | 0.70 (0.32 to 1.54) | 1.17 (0.67 to 2.02) | 1.08 (0.55 to 2.12) | 1.22 (0.73 to 2.04) |
| Has dependent children | 1.11 (0.53 to 2.33) | 0.89 (0.26 to 3.05) | 0.79 (0.31 to 1.98) | 0.74 (0.25 to 2.23) | 2.27 (0.68 to 7.60) |
| 7–20 Years of schooling | 1.03 (0.70 to 1.53) | 0.50* (0.24 to 1.04) | 1.10 (0.65 to 1.86) | 0.86 (0.45 to 1.63) | 1.18 (0.72 to 1.92) |
| Owns home | 0.28*** (0.15 to 0.53) | 0.12** (0.02 to 0.93) | 0.41** (0.17 to 1.00) | 0.10** (0.01 to 0.75) | 0.27*** (0.11 to 0.69) |
| Speaks any English | 1.37 (0.91 to 2.06) | 1.08 (0.52 to 2.23) | 2.30*** (1.35 to 3.92) | 1.54 (0.80 to 2.97) | 0.81 (0.47 to 1.38) |
| No of years worked as FSW | 1.00 (0.97 to 1.03) | 1.02 (0.98 to 1.07) | 1.03 (0.99 to 1.07) | 0.94 (0.88 to 1.02) | 0.97 (0.93 to 1.02) |
| Current work situation | |||||
| Street worker | 1.32 (0.89 to 1.96) | 1.29 (0.65 to 2.57) | 2.14*** (1.26 to 3.65) | 3.68*** (1.82 to 7.41) | 1.02 (0.62 to 1.67) |
| Dance host | 0.66* (0.43 to 1.02) | 0.75 (0.34 to 1.64) | 0.56* (0.30 to 1.04) | 0.22*** (0.08 to 0.62) | 0.86 (0.50 to 1.47) |
| Bar maid | 0.99 (0.59 to 1.65) | 1.43 (0.62 to 3.26) | 0.61 (0.28 to 1.34) | 0.62 (0.24 to 1.64) | 0.93 (0.49 to 1.79) |
| Registered with Tijuana MHS | 0.59** (0.38 to 0.39) | 0.31** (0.11 to 0.90) | 0.47** (0.24 to 0.92) | 0.18*** (0.06 to 0.60) | 0.87 (0.50 to 1.52) |
| Ever used illegal drugs before/during sex | 2.80*** (1.86 to 4.21) | 3.16** (1.56 to 6.41) | 2.83*** (1.66 to 4.82) | 4.18*** (2.12 to 8.24) | 1.52* (0.92 to 2.51) |
| Client traits | |||||
| No of regular male clients, past month | 1.00 (0.98 to 1.02) | 0.96 (0.88 to 1.05) | 1.01 (0.99 to 1.03) | 1.00 (0.97 to 1.03) | 0.98 (0.94 to 1.02) |
| No of casual male clients, past month | 0.99 (0.98 to 1.00) | 0.98 (0.95 to 1.01) | 0.99 (0.98 to 1.01) | 0.99 (0.97 to 1.01) | 1.00 (0.98 to 1.01) |
| Male clients use drugs | 1.04 (0.62 to 1.72) | 1.80 (0.62 to 5.24) | 1.09 (0.54 to 2.19) | 2.17 (0.75 to 6.26) | 1.24 (0.64 to 2.43) |
| Male clients inject drugs | 0.81 (0.55 to 1.20) | 0.91 (0.46 to 1.81) | 0.40*** (0.23 to 0.70) | 1.73* (0.89 to 3.37) | 0.97 (0.60 to 1.59) |
| Financial reliance on any male clients | 1.21 (0.82 to 1.81) | 3.17*** (1.35 to 7.41) | 1.04 (0.61 to 1.77) | 0.91 (0.48 to 1.74) | 1.15 (0.70 to 1.90) |
| Has US clients | 1.83 (1.10 to 3.04) | 0.94 (0.42 to 2.15) | 5.03 (1.78 to 14.20) | 2.81* (0.98 to 8.09) | 1.48 (0.78 to 2.82) |
| Sexual behaviours | |||||
| Any condoms carried at baseline interview | 1.32 (0.72 to 2.40) | 0.21 (0.03 to 1.59) | 0.95 (0.41 to 2.21) | 1.70 (0.71 to 4.05) | 1.20 (0.57 to 2.51) |
| Access to free condoms | |||||
| Never | 0.99 (0.67 to 1.47) | 1.13 (0.56 to 2.29) | 0.87 (0.51 to 1.47) | 0.87 (0.45 to 1.65) | 1.31 (0.79 to 2.17) |
| Sometimes | 1.11 (0.73 to 1.69) | 0.98 (0.47 to 2.06) | 1.62 (0.95 to 2.78) | 1.41 (0.73 to 2.73) | 0.89 (0.52 to 1.52) |
| Never/sometimes use condoms during anal sex, past 6 months | 1.07 (0.67 to 1.71) | 0.88 (0.37 to 2.08) | 1.00 (0.53 to 1.90) | 1.56 (0.77 to 3.19) | 1.34 (0.76 to 2.36) |
| Never/sometimes use condoms during oral sex, past 6 months | 1.02 (0.69 to 1.51) | 1.30 (0.65 to 2.60) | 1.09 (0.65 to 1.84) | 1.46 (0.77 to 2.79) | 0.97 (0.59 to 1.58) |
| Any unprotected vaginal sex with regular or casual client, past month | 2.03 (0.23 to 18.35) | 0.32 (0.03 to 2.94) | NA | NA | NA |
| Any unprotected anal sex with regular or casual client, past month | 0.88 (0.52 to 1.49) | 1.01 (0.41 to 2.52) | 0.88 (0.43 to 1.81) | 1.02 (0.43 to 2.39) | 1.12 (0.59 to 2.12) |
| Any unprotected oral sex with regular or casual clients, past month | 1.38* (0.94 to 2.05) | 1.17 (0.59 to 2.34) | 1.34 (0.79 to 2.27) | 2.59*** (1.30 to 5.13) | 1.50 (0.91 to 2.45) |
| Unprotected vaginal sex with spouse/common law partner,† past month | 0.81 (0.38 to 1.73) | 1.23 (0.25 to 6.20) | 1.24 (0.43 to 3.61) | 0.41 (0.13 to 1.28) | 0.54 (0.22 to 1.31) |
| Unprotected anal sex with spouse/common law partner,† past month | 1.16 (0.52 to 2.57) | 1.02 (0.20 to 5.18) | 2.13 (0.81 to 5.59) | NA | 0.95 (0.35 to 2.58) |
| Unprotected oral sex with spouse/common law partner,† past month | 0.86 (0.44 to 1.68) | 0.74 (0.19 to 2.86) | 1.85 (0.73 to 4.66) | 1.28 (0.42 to 3.87) | 0.65 (0.28 to 1.48) |
| Spouse/common law partner has other sexual partner†‡ | 0.71 (0.32 to 1.57) | 1.1 (0.21 to 5.70) | 0.45 (0.15 to 1.41) | 1.73 (0.46 to 6.50) | 1.26 (0.49 to 3.27) |
| Ever tested for HIV | 0.92 (0.61 to 1.38) | 0.47** (0.24 to 0.94) | 0.72 (0.42 to 1.23) | 0.82 (0.42 to 1.58) | 1.06 (0.63 to 1.77) |
*p⩽0.10; **p⩽0.05; ***p⩽0.01. †Restricted to women with a spouse/common law partner. ‡During the duration of the relationship. BC, Baja California; FSW, female sex worker; MHS, municipal health service; STI, sexually transmitted infection; UOR, unadjusted odds ratio.