Table 3:

Population level impacts of STI risk factors: Age adjusted PAR% for STIs by risk factors

	Baseline STI positivity	STI incidence
	PAR% (95% CI)	PAR% (95% CI)
Age at sexual debut	22% (16%, 28%)	29% (22%, 38%)
<15 years	2% (1%, 4%)	3% (2%, 5%)
15-19 years	20% (16%, 28%)	26% (19%, 34%)
single/not cohabiting	12% (10%, 15%)	32% (29%, 35%)
2 or more sex partners1	4% (3%, 5%)	7% (6%, 8%)
Parity categories	20% (17%, 23%)	23% (21%, 25%)
Nil	4% (02%, 5%)	4% (3%, 5%)
1 to 2 children	16% (14%, 19%)	19% (17%, 21%)
Injectable contraceptives	3% (2%, 5%)	18% (16%, 20%)
STI baseline	-	25% (23%, 27%)
Combined impacts #1	51% (47%, 58%)	53% (49%, 59%)
	Age at sexual debut  + Single/not cohabiting   + two or more sex partners    + parity <3	Age at sexual debut  + Single/not cohabiting   + two or more sex partners    + parity <3
Combined impacts #2	N/A	59% (49%, 64%)
		Age at sexual debut  + Single/not cohabiting   + two or more sex partners    + parity <3     + injectables      + STI baseline

¹past 3 months;

N/A: not applicable