Continents | Number of articles | Sample size | I2 | Begg and Mazumdar test | Prevalence % (95 % CI) |
---|---|---|---|---|---|
Asia | 10 | 25269 | 99.3 | 1.000 | 15.3 (95 % CI 7.5–28.5) |
Europe | 56 | 2176967 | 99.8 | 0.012 | 10.3 (95 % CI 6.4–16.2) |
Africa | 2 | 1111 | 42 | - | 17.2 (95 % CI 13–22.3) |
America | 17 | 4425159 | 99.8 | 0.773 | 2.3 (95 % CI 1.4–3.8) |