Table 1.
Descriptive statistics.
| Age | FSIQ | VIQ | PIQ | Mean CTh | Mean CSA | ||
|---|---|---|---|---|---|---|---|
| Time 1 | Mean (SD) Min, Max |
11.59 (3.46) 6.09, 20.05 |
112.04 (12.94) 78, 160 |
111.12 (13.82) 74, 156 |
110.29 (13.04) 72, 157 |
3.59 (0.17) 3.18, 3.99 |
2.29 (0.18) 1.82, 2.74 |
| Time 2 | Mean (SD) Min, Max |
13.55 (3.49) 7.74, 21.87 |
113.12 (12.62) 75, 150 |
111.27 (13.09) 80, 147 |
112.12 (12.94) 74, 147 |
3.55 (0.17) 3.06, 3.97 |
2.29 (0.19) 1.78, 2.73 |
| Longitudinal correlation | – | 0.83 | 0.74 | 0.80 | 0.86 | 0.98 | |
| Change | Mean (SD) Min, Max |
1.96 (0.42) 0.85, 3.81 |
1.07 (7.51) −18, 24 |
0.15 (9.62) −29, 30 |
1.82 (8.46) −25, 24 |
−0.04 (0.09) −0.28, 0.25 |
0 (0.04) −0.09, 0.13 |
FSIQ = Full scale IQ. VIQ = Verbal IQ. PIQ = Performance IQ. CTh = cortical thickness. CSA = cortical surface area. Change = Time 2 – Time 1. All correlations are significant at p < 0.01.