Change in verbal, performance, and full scale IQ standard deviation scores (IQ-SDS) between 8 and 14 years and 8 and 18 years
| Change in IQ-SDS (95% CI) | p Value3-150 | |
| 8–14 years (n = 72) | ||
| Verbal | −0.54 (−0.73 to −0.36) | <0.001 |
| Performance | −0.16 (−0.35 to 0.04) | 0.11 |
| Full scale | −0.34 (−0.51 to −0.18) | <0.001 |
| 8–18 years (n = 48) | ||
| Verbal | −0.59 (−0.82 to −0.36) | <0.001 |
| Performance | −0.16 (−0.34 to 0.03) | 0.10 |
| Full scale | −0.38 (−0.58 to −0.19) | <0.001 |
Scores are expressed as mean (95% confidence interval).
↵3-150 Paired samples t test.