Table 3

Adjusted linear and or logistic regression analysis for elevated (>90th centile) and normal (<90th centile) umbilical artery Doppler (UAD) pulsatility index (PI) for validated British Ability Scales II achievement scale parameters at 28, 34 and 38 weeks, respectively, expressed as mean and SDs

Achievement scaleWeek 28 (1.73 threshold)Week 34 (1.28 threshold)Week 38 (1.17 threshold)
NormalElevatedp ValueNormalElevatedp ValueNormalElevatedp Value
Number standard score, mean (SD)111.6 (1.2)108.1 (2.0)0.143110.8 (1.1)108.5 (3.1)0.484110.1 (1.2)104.9 (3.7)0.188
Spelling standard score, mean (SD)102.5 (1.3)100.1 (2.2)0.340102.0 (1.2)102.2 (3.4)0.947102.0 (1.3)95.6 (3.9)0.124
Reading standard score, mean (SD)98.0 (1.2)98.9 (2.0)0.69098.2 (1.1)99.4 (3.3)0.74298.9 (1.2)95.2 (3.7)0.349