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. Author manuscript; available in PMC: 2013 Dec 1.
Published in final edited form as: Infant Behav Dev. 2012 Sep 13;35(4):838–846. doi: 10.1016/j.infbeh.2012.07.019

Table 2.

Categories of infant siblings of children with ASDs (AU sibs) based on 3-month motor delay (MD) and 18-month communication delay (CD). These include infants with MD and CD, only MD, only CD, and no MD or CD.

3-month motor vs. 18-month communication performance (n=16) Communication
delay present at 18 months		 No communication
delay at 18 months
Motor delay present at 3 months 8 AU sibs had both, MD and CD 4 AU sibs had MD but no CD
No motor delay at 3 months 0 AU sibs had a CD but no MD 4 AU sibs had no MD or CD