Table.

Descriptive table of study subjects.

Group	Number	Mean age	SD
Autistic subjects
Female	13	5.87	1.80
Male	67	6.60	2.80
Total	80	6.48	2.66
Siblings
Female	19	6.70	2.00
Male	32	6.26	2.71
Total	51	6.43	2.45
Controls
Female	45	6.35	2.54
Male	41	5.81	2.52
Total	86	6.10	2.53