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Table 2 Subgroup analysis of primary/secondary infertility by year of studies

From: Primary and secondary infertility in Africa: systematic review with meta-analysis

  Number of studies Pooled proportion (95% CI) Heterogeneity (I2, p-value)
Year of studies (PI) Before 2000 3 36.75 (11.08–62.45) 96.7%, p < 0.001
2000–2004 2 51.88 (26.4-77.36) 98.8%, p < 0.001
2005–2009 5 50.08 (33.34–66.83) 98.4%, p < 0.001
2010–2014 4 47.28 (24.2-70.36) 98.2%, p < 0.001
2015–2019 6 57.26 (43.45–71.06) 98.7%, p < 0.001
Year of studies (SI) Before 2000 3 63.25 (37.55–88.94) 96.7%, p < 0.001
2000–2004 2 48.12 (22.64–73.6) 98.8%, p < 0.001
2005–2009 5 49.92 (32.96–66.88) 98.5%, p < 0.001
2010–2014 4 52.97 (30.58–75.36) 98.1%, p < 0.001
2015–2019 6 41.55 (28.92–54.19) 98.4%, p < 0.001
  1. PI primary infertility, SI secondary infertility, CI confidence interval
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