Skip to main content

Table 4 Incidence rates of pregnancy by year

From: Decreasing incidence of pregnancy among HIV-positive adolescents in a large HIV treatment program in western Kenya between 2005 and 2017: a retrospective cohort study

Year of pregnancy start Total at risk Number of incident pregnancies Pregnancies per 1000 women Number of person years of follow up Incidence rate per 1000 woman years (95% CI)
Overall 8024 448 55.8 20,466.4 21.9 (20.0, 24.0)
2005 301 7 23.3 133.1 52.6 (25.1, 110.3)
2006 612 23 37.6 309.9 74.2 (49.3, 111.7)
2007 926 34 36.7 554.9 61.3 (43.8, 85.8)
2008 1100 25 22.7 758.4 33.0 (22.3, 48.8)
2009 1398 30 21.5 1022.8 29.4 (20.6, 42.0)
2010 1698 39 23.0 1270.5 30.7 (22.4, 42.0)
2011 2106 60 28.5 1663.59 36.1 (28.0, 46.5)
2012 2428 47 19.4 1973.7 23.8 (17.9, 31.7)
2013 2649 37 14.0 2055.2 18.0 (13.0, 24.8)
2014 2634 59 22.4 2306.3 25.6 (19.8, 33.0)
2015 2767 35 12.6 2494.7 14.0 (10.1, 19.5)
2016 2938 27 9.2 2761.5 9.8 (6.7, 14.3)
2017a 2985 25 8.4 2818.5 8.9 (6.0, 13.2)
  1. aIncludes only until Feb 28, 2017