. Author manuscript; available in PMC: 2010 Nov 3.

Published in final edited form as: Am J Psychiatry. 2010 Oct 1;167(11):1349–1356. doi: 10.1176/appi.ajp.2010.09101470

Table 1.

Selected Sample Characteristics

	n	Mean Age	Gender		Mean SRS T Scores	Mean SCQ Scores
	n	Mean Age	M	F	Mean SRS T Scores	Mean SCQ Scores
First Affected Child^*	1235	9.2±3.4	1052	183	86.3±15.2	23.2±7.2
Subsequent Affected Sibs	138	8.3±3.2	100	38	85.8±17.2	22.2±7.9
Non-ASD sibs with History of Language Delay with Autistic Speech	150	8.6±3.4	80	70	55.9±15.3	6.9±6.0
Unaffected Sibs	1397	9.7±3.8	651	746	45.0±10.4	2.6±4.2

Linear regression revealed modest effects of a) gender and b) level of functioning (see text)on SRS T-Score: F=63.2, df=2, 1225, p<.0001, R² = .094; for gender, t=7.2, p<.001; for functioning level, t=-8.4, p<.001

SRS: Social Responsiveness Scale

SCQ: Social Communication Questionnaire