Table 3

 Multiple regression analysis: independent effects of social and demographic factors at recruitment on BAS-II GCA scores at 5 years (preterm groups only)

VariableSize of effect (B)*95% CIp value
*GCA points.
Both parents at home+5.55(−2.2 to 13.3)0.157
Non-manual SES+8.42(3.9 to 13.0)0.000
Maternal age (years)+0.28(−0.2 to 0.8)0.242
Number of siblings−1.76(−4.3 to 0.8)0.171
Maternal use of a car+5.18(0.4 to 10.0)0.035