Table 1.
Demographic and Imaging Variablesa
| Variable | TD n = 64 | ADHD n = 64 | P value |
|---|---|---|---|
| Demographic variables | |||
| Gender (number of male/female) | 38/26 | 38/26 | l |
| Age at scan (years) | 10.3 (1.2) | l0.5 (l.3) | .50 |
| Full-scale IQ | 116 (11) | l08 (l4) | <.00l |
| Imaging variables | |||
| Total cerebral volume (cm3) | 1160 (103) | 1110 (95) | .003 |
| Corpus callosum segment area (mm2) | |||
| Genu | 114.4 (17) | ll4.2 (l6) | .45l |
| Rostral body | 91.9 (l4) | 95.7 (l6) | .202 |
| Midbody | 83.8 (l6) | 84.0 (l2) | .896 |
| Isthmus | 73.0 (l6) | 73.4 (l4) | .847 |
| Splenium | l29.0 (l7) | l34.l (22) | .226 |
| Corpus callosum segment circumference (mm) | |||
| Genu | 59.2 (8) | 59.7 (7) | .825 |
| Rostral body | 60.9 (8) | 62.l (9) | .904 |
| Midbody | 48.8 (8) | 49.6 (8) | .922 |
| Isthmus | 60.3 (l4) | 59.0 (9) | .l5l |
| Splenium | 5l.l (7) | 52.5 (7) | .703 |
NOTE: TD, typically developing; ADHD, attention-deficit hyperactivity disorder.
a
All values presented as mean (SD) unless otherwise specified. P values for demographic variables obtained from independent group's t tests or chi-square analyses. P values for between-group comparisons of imaging variables are derived from the analyses of covariance including Full-Scale IQ as a covariate.