Table 2 Age-specific prevalence of ADHD symptoms in children from the parent and teacher surveys
Parent survey | Teacher survey | Prevalence ratio (95% CI) (parents/teachers) | |
|---|---|---|---|
4-year-old children (3 or 4 years olda) | 742/2,080 (35.7%) | 181/3,223 (5.6%) | 6.4 (5.5–7.4) |
5-year-old children (4 or 5 years olda) | 811/2,577 (31.5%) | 149/3,333 (4.5%) | 7.0 (6.0–8.3) |
6-year-old children (5 or 6 years olda) | 796/2,909 (27.4%) | 101/3,400 (3.0%) | 9.2 (7.5–11.3) |