Impact of intervention on selected primary and secondary outcomes according to age group in 2007/81.

1. Overall prevalence ratio adjusted for gender, age group, stratum and ethnic group (Sukuma vs non-Sukuma). Prevalence ratio for each age group adjusted for gender, stratum and ethnic group (Sukuma vs non-Sukuma).2. From test for interaction.3. Among those who reported having had sex in past 12m.4. Analysis using arithmetic means.