Figure 1
Trends in HIV-1 prevalence by sex and survey among adults aged 15–44 years in rural Kilimanjaro region of Tanzania. The figure illustrates the increased HIV-1 trends by sex from 1991 to 2005. The increased prevalence trends were significant for both sexes (ptrends < 0.001 for both sexes). * 1997 survey included individuals aged 15–36 years only. § Only individuals who participated in the 1991 survey and available in the village in 1993 were registered.