Table 2.
Prevalence by | Sample size | Pooled estimate (%), 95% CI | Heterogeneity test |
Heterogeneity (I2 %) | |
---|---|---|---|---|---|
Chi-square(Q) | p | ||||
Boys | 49,559 | 1.6 (1.2–2.05) | 244.9 | <0.001 | 92.6 |
Girls | 107,321 | 8.8 (7.6–9.9) | 4,636.5 | <0.001 | 99.3 |
Total | 200,306 | 7.4 (6.6–8.2) | 5,633.7 | <0.001 | 99.3 |
CI = confidence limit.