Table 1 Summary of Demographic Characteristics
6- and 7-Year Olds | 8- to 12-Year Olds | |||||
|---|---|---|---|---|---|---|
ATX | PBO | ATX | PBO | |||
Subject Characteristics | N = 184 | N = 96 | pa | N = 544 | N = 316 | pa |
Gender, n (%) | ||||||
Female | 54 (29.3) | 22 (22.9) | .262 | 137 (25.2) | 78 (24.7) | .935 |
Male | 130 (70.7) | 74 (77.1) | 407 (74.8) | 238 (75.3) | ||
Age (years), mean (SD) | 7.2 (0.6) | 7.1 (0.5) | . 273b | 10.2 (1.4) | 10.2 (1.4) | .606b |
Origin, n (%) | ||||||
African descent | 16 (8.7) | 15 (15.6) | .179 | 81 (14.9) | 40 (12.7) | .442 |
Caucasian | 137 (74.5) | 64 (66.7) | 374 (68.8) | 234 (74.1) | ||
Hispanic | 22 (12.0) | 9 (9.4) | 59 (10.8) | 27 (8.5) | ||
Other | 9 (4.9) | 8 (8.3) | 30 (5.5) | 15 (4.7) | ||
Prior stimulant treatment, n (%) | ||||||
No | 133 (72.3) | 68 (70.8) | .889 | 235 (43.3) | 141 (44.6) | .722 |
Yes | 51 (27.7) | 28 (29.2) | 308 (56.7) | 175 (55.4) | ||
ADHD Subtype, n (%) | ||||||
Hyperactive/impulsive | 10 (5.4) | 2 (2.1) | .395 | 10 (1.8) | 5 (1.6) | .828 |
Inattentive | 26 (14.1) | 12 (12.5) | 148 (27.2) | 92 (29.1) | ||
Combined | 148 (80.4) | 82 (85.4) | 386 (71.0) | 219 (69.3) | ||
ADHD Severity, mean (SD) | ||||||
Baseline ADHD Total T score | 83.4 (9.5) | 83.2 (8.7) | .862 | 81.7 (11.6) | 81.2 (11.2) | .512 |
Baseline CGI-ADHD-S score | 5.0 (0.8) | 5.0 (0.7) | .743 | 4.9 (0.8) | 4.9 (0.8) | .909 |