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Distribution of ADHD prevalence according to age
| Age (years) | Sample size (n) | Prevalence of ADHD
|
|
|---|---|---|---|
| N | % | ||
| 7 | 472 | 22 | 4.66 |
| 8 | 646 | 39 | 6.03 |
| 9 | 604 | 44 | 7.28 |
| 10 | 493 | 33 | 6.69 |
| 11 | 554 | 25 | 4.51 |
| 12 | 190 | 12 | 6.31 |
| Total | 2,959 | 175 | 5.91 |
Notes: Groups χ2=5.285; df=5; P=0.382.
Abbreviation: ADHD, attention-deficit hyperactivity disorder.
