Table 2

 Means and ranges for the four index scores from the WISC–III UK

MeasurePatients Mean (range) [95% CI]Siblings Mean (range) [95% CI]p value
Perceptual organisation75890.009
(64–98)(74–104)
[68–82][83–95]
Processing speed87970.24
(68–112)(73–137)
[78–96][86–108]
Verbal comprehension75810.24
(56–91)(64–97)
[68–82][74–88]
Freedom from distractibility92940.74
(71–106)(77–109)
[84–100][87–101]