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. Author manuscript; available in PMC: 2013 Jan 3.
Published in final edited form as: AIDS. 2010 Jan 2;24(1):147–152. doi: 10.1097/QAD.0b013e32833062dc

Table 1.

Estimates of HIV incidence (15–44 years).

Estimate
(/1000person-years)
95% Bootstrap
interval
IRR (15–24 s
women: men)a
IRR (25–44 s
women: men)b
IRR
(5 years)c
Low-prevalence countries
 Dominican Republic [0.8%] 2002–2007
  Overall 0.49 0.13 1.04 0.98 0.94 0.44
  Men 0.50 0.15 1.05 0.38
  Women 0.48 0.11 1.02 0.52
 Mali [1.2%] 2001–2006
  Overall 1.14 0.23 2.65 0.85 0.23 0.59
  Men 1.47 0.32 2.91 0.86
  Women 0.78 0.13 2.37 0.36
 Niger [0.7%] 2002–2006
  Overall 0.58 0.01 2.14 2.74 0.41 0.47
  Men 0.69 0.02 2.49 0.62
  Women 0.47 0.00 1.79 0.35
High-prevalence countries
 Tanzania [7.0%] 2004–2008
  Overall 3.37 1.52 6.42 9.33 0.50 0.44
  Men 2.36 0.75 5.22 0.34
  Women 4.42 2.32 7.65 0.53
 Zambia [15.6%] 2002–2007
  Overall 11.22 6.60 16.52 1.38 0.52 0.64
  Men 11.34 6.66 16.26 0.80
  Women 11.07 6.54 16.81 0.53

Estimates are per 1000 person-years at risk and weighted by the number susceptible in the population. Values in square brackets show the HIV prevalence among adults of 15–49 years in the most recent survey. IRR, incidence rate ratio.

a

IRR (15–24 s women: men) is the ratio of incidence among 15–24-year-old women in the intersurvey period, compared with men of the same age.

b

IRR (25–44 s women: men) is the ratio of incidence among 25–44-year-old women in the intersurvey period, compared with men of the same age.

c

IRR (5 years) is the ratio of incidence among 15–44-year-olds in the intersurvey period, compared with incidence in the 5 years before the first year (assuming constant prevalence). Values underlined indicate that the corresponding 95% bootstrap interval did not include 1.0.

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