Table 1.
Characteristics and allergic diseases of children with ADHD and control subjects.
| Variables | ADHD (N = 115) | Controls (N = 72) | Statistics | p-Value | ||
|---|---|---|---|---|---|---|
| Mean or N | SD or % | Mean or N | SD or % | |||
| Age (years) | 8.9 | 2.3 | 9.9 | 2.6 | t =2.543 | 0.012 |
| Sex | χ2 = 9.069 | 0.003 | ||||
| Female | 23 | 20.0 | 29 | 40.3 | ||
| Male | 92 | 80.0 | 43 | 59.7 | ||
| Allergic diseases | ||||||
| Allergic rhinitis | 28 | 24.3 | 19 | 26.4 | χ2 = 0.098 | 0.754 |
| Asthma | 16 | 13.9 | 12 | 16.7 | χ2 = 0.264 | 0.608 |
| Atopic dermatitis | 7 | 6.1 | 5 | 6.9 | χ2 = 0.054 | 0.816 |
| At least one allergic disease | 41 | 35.7 | 23 | 31.9 | χ2 = 0.270 | 0.603 |
Note: Data are expressed as mean ± SD or n (%). The t-value and p-value were calculated using the independent t-test; the χ2 and p-value were calculated using chi-square test.