Table 1. Characteristics of the Study Sample.
Characteristics | Male | Female | Total |
Sample size, n (%) | 638(57.9) | 463 (42.1) | 1101 (100.0) |
Age in years | |||
13 and younger, n (%) | 313 (55.4) | 252 (44.6) | 565 (100) |
14 and older, n (%) | 325(60.6) | 211(39.4) | 536(100) |
Mean (SD) | 13.8(1.2) | 13.7(1.2) | 13.8(1.2) |
School grade, n (%) | |||
Grade 7 | 326(57.6) | 240(42.4) | 566(100) |
Grade 8 | 129(58.4) | 94(41.6) | 221(100) |
Grade 9 | 183(58.3) | 131(41.7) | 314(100) |
YIAT-C score** | |||
Mean score (SD) | 37.4(12.6) | 33.9(10.7) | 36.0(11.9) |
Parental relationship | |||
Mean score (SD) | 46.6(10.8) | 46.3 (11.9) | 46.5(11.3) |
Hyperactivity-Impulsivity | |||
Mean score (SD) | 3.6(2.1) | 3.9(2.2) | 3.7(2.1) |
Note: **: p<0.01 from t-test.