Table 1.

Participant characteristics by group at the 10-month assessment, final samples (Mean/SD)

Measure	HR-ASD (n = 29, 7 girls)	HR-no-ASD (n = 118, 62 girls)	TD (n = 40, 20 girls)	GLM with group as fixed factor
Age (days)	288.31/31.65	283.01/26.80	294.05/25.40	F(2, 184) = 2.532 P = 0.082
MSEL TOTa	101.41/15.50	106.58/15.02	108.35/14.16	F(2, 184) = 1.947 P = 0.146
SESb	3.21/1.35	3.79/1.21 (n = 117)	4.38/1.00	F(2, 183) = 8.219 P < 0.001

^a Mullen Scales of Early Learning total score

^b Socio-economic status based on parental education on a five level rank scale. While there is a significant difference between groups, this difference does not influence our main results: adding SES as a factor in the analysis did not change the pattern of results