Table 4 Incidence rates of pregnancy by year
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) |