Table 2.

Multivariable Cox Proportional Hazards Regression: Relative Hazard of Gonorrhea, Chlamydia, and Trichomonas

Variable	Gonorrhea, N=2,449 Hazard Ratio (95% C.I.), p-value	Chlamydia, N=2,450 Hazard Ratio (95% C.I.), p-value	Trichomonas, N=2,626 Hazard Ratio (95% C.I.), p-value
Reported age in years (continuous)			^1.21 (1.03 – 1.41), 0.017
Educational attainment at baseline      None, Primary 1–8      Secondary 1–3      Secondary 4, Post-secondary		ref 0.64 (0.41 – 0.99), 0.044 ^0.58 (0.41 – 0.81), 0.001
Gonorrhea or chlamydia infection at baseline	^3.04 (1.93 – 4.77), <0.001	1.70 (1.06 – 2.73), 0.029
Chlamydia infection at baseline			^2.49 (1.07 – 5.78), 0.034
Trichomonas infection at baseline			^5.34 (2.16 – 13.2), <0.001
Number of sex partners past month      None      One      Two or more	ref 1.37 (0.83 – 2.26), 0.220 ^2.25 (1.29 – 3.94), 0.004	ref ^1.81 (1.16 – 2.82), 0.009 1.89 (1.11 – 3.22), 0.018
Condom used at last intercourse	^0.50 (0.35 – 0.72), <0.001		^0.52 (0.30 – 0.88), 0.015
Vaginal sex with a woman during her menses	1.64 (1.03 – 2.61), 0.036	^1.78 (1.18 – 2.70), 0.006
Penis ever scratched or sore during sex	^1.61 (1.13 – 2.31), 0.009

^{^}= Statistically significant by Holm corrected p-value; C.I. = Confidence Interval

Statistically significant variables entered from univariate analysis that were not statistically significant in the multivariable models are not shown.