Continent | No. of studies | n/N | Pooled prevalence (95% CI) (%) | Weight | Heterogeneity | ||
---|---|---|---|---|---|---|---|
df | I2 (%) | P-value | |||||
Global | 101 | 3169/11,809 | 33 (29–37) | 100 | 100 | 98.72 | P < 0.001 |
Africa | 7 | 184/445 | 43 (12–75) | 6.96 | 6 | 99.33 | P < 0.001 |
Asia | 44 | 1164/6127 | 28 (23–33) | 43.64 | 43 | 97.54 | P < 0.001 |
Australia | 2 | 71/118 | 62 (54–70) | 1.94 | 1 | – | – |
Europe | 18 | 1079/2453 | 46 (38–53) | 17.89 | 17 | 93.71 | P < 0.001 |
North America | 10 | 301/940 | 33 (24–43) | 9.95 | 19 | 90.94 | P < 0.001 |
South America | 20 | 370/1726 | 25 (18–32) | 19.63 | 9 | 96.85 | P < 0.001 |