From: Global prevalence of congenital anencephaly: a comprehensive systematic review and meta-analysis
Meta-analysis | N | Sample size | I2 | Begg and Mazumdar | Prevalence (95% CI) |
---|---|---|---|---|---|
Overall prevalence | 340 | 169,407,738 | 99.9 | 0.105 | 5.1 (95% CI 4.7–5.5) |
Continent | |||||
Asia | 50 | 12,449,402 | 99.9 | 0.776 | 6.5 (95% CI 5.5–7.7) |
Europe | 126 | 43,826,079 | 99.9 | 0.906 | 4.8 (95% CI 4.2–5.5) |
America | 128 | 106,111,868 | 99.9 | 0.809 | 4.3 (95% CI 3.8–4.8) |
Africa | 5 | 4,415,752 | 99.9 | 0.278 | 6.5 (95% CI 1–9.9) |
Australia | 30 | 12,615,064 | 99.7 | 0.111 | 8.6 (95% CI 7.7–9.5) |