Table 1 Demographics
Variable | EUR group ( N=1217) | NE group ( N=800) | Total ( N=2017) | p-value |
|---|---|---|---|---|
Age in Years (Mean ± SD) | 33.0 ± 9.2 | 33.4 ± 8.9 | 33.2 ± 9.1 | .3999b |
Age <25, n (%) | 298 (24.5) | 160 (20.0) | 458 (22.7) | .0195a |
Age ≥25, n (%) | 919 (75.5) | 640 (80.0) | 1559 (77.3) |  |
Race, n (%) | Â | Â | Â | <.0001a |
  Caucasian | 1192 (97.9) | 573 (71.6) | 1765 (87.5) |  |
  African | 5 (0.4) | 51 (6.4) | 56 (2.8) |  |
  Hispanic | 9 (0.7) | 150 (18.8) | 159 (7.9) |  |
  Other | 11 (0.9) | 24 (3.0) | 35 (1.7) |  |
Gender, n (%) | Â | Â | Â | Â |
  Male | 702 (57.7) | 482 (60.3) | 1184 (58.7) | .2673a |
  Female | 515 (42.3) | 318 (39.8) | 833 (41.3) |  |
Body Weight (kg), Mean (SD) | 76.8 (17.6) | 82.4 (19.7) | 79.0 (18.7) | <.0001b |
Height (cm), Mean (SD) | 173.8 (9.4) | 171.7 (10.0) | 173.0 (9.7) | <.0001b |
Prior Exposure to Psychostimulants, n (%) | Â | Â | Â | |
  Yes | 398 (32.7) | 311 (38.9) | 709 (35.2) | .0049a |
  No | 819 (67.3) | 489 (61.1) | 1308 (64.8) |  |
ADHD Subtype, n (%) | Â | Â | .0001a | |
  Inattentive | 298 (24.5) | 168 (21.0) | 466 (23.1) |  |
  Hyperactive/Impulsive | 40 (3.3) | 7 (0.9) | 47 (2.3) |  |
  Combined | 872 (71.7) | 623 (77.9) | 1495 (74.1) |  |
Family History of ADHD, n (%) | Â | Â | Â | |
  Children | 308 (25.3) | 159 (19.9) | 467 (23.2) | .0343a |
  Mother | 63 (5.2) | 46 (5.8) | 109 (5.4) | .2753a |
  Father | 104 (8.5) | 63 (7.9) | 167 (8.3) | .2532a |
  Siblings | 156 (12.8) | 146 (18.3) | 302 (15.0) | .0043a |