Table 1 Descriptive statistics

N

555

137

297

121

Age (sd)

14.360 (3.394)

9.672 (1.058)

14.790 (1.710)

18.640 (.837)

Biological sex (# female/percentage)

272 (49.100%)

64 (46.715%)

138 (46.464%)

70 (57.851%)

ADHD total symptoms (sd)

2.223 (2.891)

2.489 (3.080)

2.037 (2.883)

2.380 (2.675)

ADHD inattention symptoms (sd)

1.634 (2.173)

1.759 (2.235)

1.562 (2.249)

1.669 (1.908)

ADHD hyperactivity/impulsivity symptoms (sd)

.589 (.967)

.729 (1.068)

.475 (.893)

.711 (.995)

Brain regions (volume)

  Angular gyrus, standardized (sd)

 − .010 (.867)

.458 (.872)

 − .049 (.803)

 − .044 (.754)

  Caudate, standardized (sd)

 − .011 (.975)

.302 (.935)

 − .068 (.987)

 − .227 (.909)

  Cingulate gyrus, standardized (sd)

 − .013 (.988)

.469 (.874)

 − .044 (.984)

 − .485 (.872)

  DLPFC, standardized (sd)

 − .015 (.983)

.547 (.934)

 − .073 (.934)

 − .511 (.906)

  Inferior temporal lobe, standardized (sd)

 − .008 (.996)

.328 (.890)

.022 (.947)

 − .460 (1.062)

  Total intracranial volume, mm³ (sd)

1413671 (143764.2)

1417708 (114153.5)

1421687 (146137.3)

1389422 (164925.8)