Multiple regression analysis: independent effects of social and demographic factors at recruitment on BAS-II GCA scores at 5 years (preterm groups only)
| Variable | Size of effect (B)* | 95% CI | p 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 |