Sexually Transmitted Infections in Women Participating in a Biomedical Intervention Trial in Durban: Prevalence, Coinfections, and Risk Factors

Table 3

Risk factors for STI acquisition during study follow-up.

	STI incidence
	Unadjusted HR (95% CI)	𝑃 value	Adjusted^a HR (95% CI)	𝑃 value
Age
<23 years	1.36 (1.09, 1.71)	0.007	1.50 (1.17, 1.93)	0.001
23–27 years	0.95 (0.72, 1.26)	0.720	1.07 (0.80, 1.44)	0.628
28–32 years	0.84 (0.63, 1.10)	0.191	0.83 (0.63, 1.10)	0.197
38+ years	1		1
Previous STI diagnosis
Chlamydia	1.77 (1.35, 2.31)	0.000	1.77 (1.32, 2.35)	0.000
Gonorrhea	1.49 (0.92, 2.43)	0.104	1.19 (0.72, 1.98)	0.500
Trichomonas	1.89 (1.43, 2.50)	0.000	1.58 (1.20, 2.10)	0.001
T. pallidum	4.67 (3.37, 6.46)	0.000	5.13 (3.65. 7.22)	0.000
Education
Low education	1.27 (1.00, 1.60)	0.044	1.30 (1.02, 1.66)	0.034

CI: confidence interval; HR: hazard ratio.