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. Author manuscript; available in PMC: 2013 Apr 29.
Published in final edited form as: Res Autism Spectr Disord. 2013 Jan 1;7(1):82–92. doi: 10.1016/j.rasd.2012.07.005

Table 4.

Table of analyses performed.

Group comparison of
primary interest		 Type of outcome measure Type of statistical
model		 Factors controlled for in model Results
(1) Typically developing versus AD Raw volumes (cm3) Multiple linear regression Performance IQ (measured as number of SDs from normal) Total brain volume (cm3) Table 5
(2) AD with no stereotypies at school age versus AD with 1–10 stereotypies at school age versus more than 10 stereotypies at school age Standardized volumes representing each subject’s deviation from a TD subject of the same gender, measured in number of SDs Multiple linear regression Actual performance IQ Total brain volume (cm3) Table 6
(3) AD with no stereotypies at school age versus AD with stereotypies at school age Standardized volumes representing each subject’s deviation from a TD subject of the same gender, measured in number of SDs Multiple linear regression Actual performance IQ Total brain volume (cm3) Table 7