Table 3.

Poisson regression models of the association between HSV-2 and partner age-gap within the most recent partnerships reported by HIV-negative 15–24 year old women in KwaZulu-Natal South Africa (2014/15)

model number	(1)	(2)	(3)	(4)
dependent variable	HSV-2	HSV-2	HSV-2	HSV-2
	PR (95% CI)	aPR (95% CI)	PR (95% CI)	aPR (95% CI)
Partnership age-gap (ref: <5 years)
≥5 years	1.26***	1.25**
	(1.06 – 1.50)	(1.05 – 1.50)
5–9 years			1.23**	1.22**
			(1.03 – 1.47)	(1.01 – 1.47)
≥10 years			1.43*	1.45*
			(0.98 – 2.08)	(0.98 – 2.13)
^Control variables	no	yes	no	yes
Observations	1,059	1,059	1,059	1,059

Notes:

^***p<0.01,

^**p<0.05,

^*p<0.1.

PR: unadjusted prevalence ratio; aPR: Adjusted prevalence ratio; 95% CI: 95% Confidence interval.

Robust standard errors, clustered at the enumeration area level.

See Supplementary File 2, Table S2, for the full multivariable regression models presented in column 2 & 4, including coefficients for the control variables in each model.

^{^}Control variables in all models included age of the woman (years); education; monthly household income; number of lifetime sexual partners; whether the participant reported using condoms at first sex, and age at first sex.