The pooled prevalence of encephalocele among African countries
| Country | Prevalence in % (95% CI) |
| Morocco | 0.002 (0.001 to 0.002) |
| Tunisia | 0.004 (0.004 to 0.004) |
| Algeria | 0.004 (0.003 to 0.005) |
| Libya | 0.006 (0.005 to 0.007) |
| Kenya | 0.007 (-0.006 to 0.020) |
| Cameron | 0.009 (0.009 to 0.010) |
| Ghana | 0.009 (0.008 to 0.009) |
| South Africa | 0.015 (0.008 to 0.022) |
| Tanzania | 0.020 (0.002 to 0.038) |
| Ethiopia | 0.022 (-0.004 to 0.047) |
| DR of Congo | 0.023 (0.020 to 0.026) |
| Egypt | 0.040 (0.035 to 0.045) |
| Sudan | 0.043 (0.033 to 0.054) |
| Nigeria | 0.059 (0.038 to 0.081) |
| D+L pooled ES | 0.025 (0.023 to 0.027) |
D+L, Der Simonian and Laird; DR, Democratic Republic; ES, Effect Size.