Table 3

ROC curve analysis for the prediction of a poor KS4 score

Educational measures includedUnadjustedAdjusted for social factors*Adjusted for social*
and antenatal factors†
Adjusted for social*, antenatal† and intrapartum‡ factors
AUCPinteraction AUCPinteraction AUCPinteraction AUCPinteraction
KS10.83 (0.82 to 0.84)0.2740.85 (0.84 to 0.86)0.3390.85 (0.84 to 0.86)0.2780.85 (0.84 to 0.86)0.275
KS20.87 (0.87 to 0.88)0.7760.88 (0.88 to 0.89)0.6750.89 (0.88 to 0.89)0.6210.89 (0.88 to 0.89)0.647
KS30.87 (0.86 to 0.87)0.2130.87 (0.87 to 0.88)0.1730.88 (0.87 to 0.88)0.1750.88 (0.87 to 0.88)0.157
  • Outcome is the area under the ROC curves. P values are for interaction with preterm status.

  • *Social factors: maternal age, socioeconomic group and education and ethnicity.

  • †Antenatal factors: gender, parity, weight, length and head circumference at birth.

  • ‡Intrapartum factors: mode of delivery and maternal hypertension.

  • AUC, area under the curve; KS, Key Stage; ROC, receiver operating characteristics.