Table 2 Subgroup analysis of ASD prevalence by continents
Continent | Study (n) | Sample size | Heterogeneity I2% | Begg and Mazumdar Test | Prevalence (%) (95% CI) |
|---|---|---|---|---|---|
Asia | 26 | 7,356,939 | 99.9 | 0.103 | 0.4 (95% CI: 0.1–1) |
America | 16 | 3,758,240 | 99.6 | 0.137 | 1 (95% CI: 0.8–1.1) |
Europe | 25 | 17,480,163 | 99.9 | 0.171 | 0.5 (95% CI: 0.2–1) |
Africa | 4 | 54,326 | 99 | 0.734 | 1 (95% CI: 0.3–3.1) |
Australia | 3 | 1,563,089 | 99.7 | 0.296 | 1.7 (95% CI: 0.5–6.1) |