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. 2011 Nov 28;108(50):20195–20200. doi: 10.1073/pnas.1107560108

Table 4.

Results of longitudinal mixed-effects model for male head circumference

TD (mean ± SD) cm
At birth At 4.0–5.0 mo
34.6 ± 1.8
 42.8 ± 1.4
Covariate Effect SE P value
ASD-nREG (cm) 0.57 0.37 0.128
ASD-REG (cm) 1.13 0.32 0.001
Age < 4.5 mo (cm/mo) 1.80 0.05 <0.001
Age ≥ 4.5 mo (cm/mo) 0.44 0.02 <0.001
ASD-nREG x age (<4.5 mo) 0.21 0.07 0.003
ASD-REG x age (<4.5 mo) 0.14 0.06 0.021

See Table 1 legend for definitions.