Table 2 Seroincidence rates per 100 person-years for the HIV cohort of repeat-testers who were HIV-uninfected at baseline (2011).
Person-yearsEventsIncidence per
100 person-years
Rate95% CI
Population HIV prevalence
  0–14.9%935181.92(1.21–3.05)
  15–24.9%15,6934803.06(2.8–3.34)
  25+%9,5903613.76(3.4–4.17)
Sex
  Male9,9431941.95(1.69–2.25)
  Female16,2766654.09(3.79–4.41)
Age strata
  15–9,2282572.78(2.46–3.15)
  20–4,9982875.74(5.11–6.45)
  25–2,8381575.53(4.73–6.47)
  30–1,727663.82(3–4.86)
  35–1,735291.67(1.16–2.4)
  40–2,015301.49(1.04–2.13)
  45+3,675330.9(0.64–1.26)
Area of residence
  Rural16,8175103.03(2.78–3.31)
  Peri-urban8,3813123.72(3.33–4.16)
  Urban1,019373.63(2.63–5.01)
Marital status
  Single15,0784482.97(2.71–3.26)
  Married
monogamous
5,8981963.32(2.89–3.82)
  Married
polygamous
5,2422154.1(3.59–4.69)
Number of partners in the last 12 months
  Zero11,8273282.77(2.49–3.09)
  One10,2913683.58(3.23–3.96)
  More than one4,1001633.98(3.41–4.64)
Household wealth quintile
  Poorest5,3482013.76(3.27–4.31)
  2nd poorest5,4281633.00(2.58–3.5)
  3rd poorest5,9322183.67(3.22–4.2)
  4th poorest5,3631723.21(2.76–3.72)
  Wealthiest4,1461052.53(2.09–3.07)
N = 8,732