Table 1 Head Injury, TBI, and IQ Among Inmates without ADHD and with ADHD
All Inmates N = 390 n (%) | without ADHD n = 294 n (%a) | with ADHD n = 96 n (%b) | OR (95% CI) | p | |
|---|---|---|---|---|---|
ADHD prevalence | 294 (75.4c) | 96 (24.6c) | |||
Head injury frequency | |||||
None | 110 (28.2) | 90 (30.6) | 20 (20.8) | ||
1 | 64 (16.4) | 57 (19.4) | 7 (7.3) | ||
2 to 3 | 82 (21.0) | 61 (20.8) | 21 (21.9) | ||
4 to 6 | 63 (16.2) | 39 (13.3) | 24 (25.0) | ||
7 to 10 | 43 (11.0) | 32 (10.9) | 11 (11.5) | ||
11 or more | 28 (7.2) | 15 (5.1) | 13 (13.5) | 2.19 (1.44, 3.31)d | < 0.001 |
Any head injury | 280 (71.8) | 204 (69.4) | 76 (79.2) | 1.68 (0.97, 2.91) | 0.070 |
Likely TBI | 169 (43.3) | 116 (39.5) | 53 (55.2) | 1.89 (1.19, 3.01) | 0.007 |
IQ estimate, mean [sd] | 76.9 [14.4] | 78.2 [13.9] | 72.9 [15.3] | t 3.10 (385)e | 0.002 |