Table 2 Factors associated with responding to the screening initiative, excluding partial responders.

Predictors for responding to initiative	Crude OR (95% CI)	Adjusted OR (95% CI)
Randomisation group
Clinic, n = 313 (r)	1.0	1.0
Home, n = 270	1.6 (1.2 to 2.2)	1.7 (1.2 to 2.5)
Age (years)
1st quartile (14–17) (r)	1.0	1.0
2nd quartile (18–20)	2.2 (1.4 to 3.4)	1.9 (1.2 to 3.0)
3rd quartile (21–22)	1.8 (1.1 to 2.9)	1.5 (0.9 to 2.6)
4th quartile (23–25)	2.7 (1.6 to 4.4)	2.9 (1.6 to 5.1)
Ever attended university/technikon	2.2 (1.4 to 3.4)	1.8 (1.1 to 2.9)
Recruitment site
Uluntu clinic (r)	1.0	1.0
Nyanga clinic	0.4 (0.3 to 0.6)	0.4 (0.2 to 0.5)
Non‐clinic	0.6 (0.3 to 0.9)	0.6 (0.3 to 1.0)
Ever treated for STI	1.9 (1.3 to 2.9)	1.6 (1.0 to 2.5)
Number of sex partners in last 6 months	1.3 (0.9 to 1.8)	1.1 (0.8 to 1.7)

r, reference group; STI, sexually transmitted infection.