Table 2.

Annual incidence of STI diagnosis by trial condition for all participants and by gender

	HE	RR	ePN	Effect size: ePN vs HE	Effect size: RR vs HE
Number of incident STI diagnoses; incidence per 100 person-years (py)				IRR (95% CI)	IRR (95% CI)
All participants
	141/350; 40.3 per 100 py	128/350; 36.6 per 100 py	136/350; 38.9 per 100 py	1.0 (0.7 to 1.3), p=0.8	0.9 (0.7 to 1.2), p=0.5
Gender*
Male	55/175; 44.0 per 100 py	61/177; 44.1 per 100 py	45/175; 36.5 per 100 py	0.8 (0.6 to 1.2), p=0.4	1.0 (0.7 to 1.4), p=0.9
Female	51/173; 36.2 per 100 py	35/174; 28.9 per 100 py	53/175; 41.1 per 100 py	1.1 (0.8 to 1.6), p=0.5	0.8 (0.5 to 1.2), p=0.3

*One participant in the HE arm had missing gender.

ePN, enhanced partner notification; HE, health education; IRR, incidence rate ratio; RR, risk reduction.