Table 2 Characteristics of the study population at baseline
Characteristic | Sample 1a | Sample 2b |
|---|---|---|
n | 1185 | 1172 |
Demographics | Â | Â |
Age, years, mean (SD) | 11.0 (2.9) | 11.1 (2.9) |
 Age 6–12 years, n (%) | 793 (67) | 782 (67) |
 Age 13–17 years, n (%) | 392 (33) | 390 (33) |
Gender, n (%) | Â | Â |
 Female | 292 (25) | 316 (27) |
 Male | 893 (75) | 856 (73) |
Clinical measures, mean (SD) | Â | Â |
ADHD-RS-IV | Â | Â |
 Total scale | 42.0 (6.5) | 42.0 (6.5) |
 Inattention | 19.3 (5.3) | 19.3 (5.3) |
 Hyperactivity Impulsivity | 22.7 (3.2) | 22.6 (3.4) |
CGI–S | 4.9 (0.8) | 4.9 (0.8) |
WFIRS-P, mean (SD) | Â | Â |
Family domain | 1.24 (0.78) | 1.24 (0.76) |
Learning and School domain | 1.31 (0.65) | 1.28 (0.64) |
Life Skills domain | 1.14 (0.53) | 1.11 (0.51) |
Child’s Self-Concept domain | 0.91 (0.79) | 0.90 (0.78) |
Social Activities domain | 0.96 (0.73) | 0.95 (0.71) |
Risky Activities domain | 0.48 (0.40) | 0.46 (0.38) |
WFIRS-P summary index | 1.03 (0.47) | 1.01 (0.45) |