Table 4

Multiple regression analysis: independent effects of factors on Griffiths quotient at 2 years (preterm children only)

VariableSize of effect (B)4-150SE B95% CIp Value
Both parents at home+5.831.88(0.8 to 9.6).0023
Non-manual SES+6.041.28(3.0 to 9.2).0000
Maternal age (per year)+0.33 .13(0.1 to 0.7).0127
Number of siblings (per sibling)−2.85 .60(−1.4 to −4.2).0000
Use of car by mother+3.371.32(0.1 to 6.1).0112
  • 4-150 GQ points