Table 1.
Participant characteristics
| Cross‐sectional cohort | Longitudinal cohort | Cohort differences (P) | |
|---|---|---|---|
| Number of subjects (females) | 78 (28) | 26 (13)a | ‐ |
| Number of scans (females) | 78 (28) | 51 (23) | ‐ |
| Handedness (left) | 72 (6) | 20 (6) | ‐ |
| Mean age (cohort) | 13.04 ± 3.27 years | 10.78 ± 2.69 years | <0.0001 |
| Mean age Females | 13.05 ± 3.19 years | 10.46 ± 2.55 years | 0.003 |
| Mean age Males | 13.03 ± 3.34 years | 11.06 ± 2.81 years | 0.01 |
| Intracranial Volume (ICV) | 1.51 ± 0.13 litres | 1.51 ± 0.11 litres | 0.71 |
| MRI scan type | 3 Tesla | 1.5 Tesla | ‐ |
a
Eight subjects were scanned once in this cohort.