Skip to main content

Advertisement

Table 1 Demographic characteristics of the longitudinal study sample and P -values for group comparisons

From: Atypical development of white matter microstructure of the corpus callosum in males with autism: a longitudinal investigation

  ASD TDC P -value
Number of subjects 100 56 -
Scans per subject, mean (SD) 2.9 (1.1) 2.6 (1.1) 0.18
Scans at time 1 92 43 -
Scans at time 2 75 35 -
Scans at time 3 66 41 -
Scans at time 4 54 28  
Total number of scans 287 147 -
Age (years), mean (SD) 18.3 (8.5) 18.9 (7.8) 0.46
Age range 3.3 to 40.6 3.4 to 41.8 -
Interscan interval, mean (SD) 2.7 (0.4) 2.6 (0.5) 0.20
Interscan interval range 1.7 to 3.9 1.6 to 4.4 -
FSIQa mean (SD) 100.1 (17.6) 118.2 (13.2) <0.001
FSIQ range 53 to 138 89 to 153 -
VIQa mean (SD) 96.3 (21.1) 114.7 (13.2) <0.001
VIQ range 51 to 145 87 to 151 -
PIQa mean (SD) 102.6 (17.9) 116.3 (14.8) <0.001
PIQ range 62 to 140 87 to 155 -
  1. ASD, autism spectrum disorder; FSIQ, full-scale IQ; PIQ, performance IQ; TDC, typically developing controls; VIQ, verbal IQ. a Calculated as mean for each individual then averaged across each group.