Table 2.

Adjusted linear 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 diagnostic scale parameters at 28, 34 and 38 weeks expressed as mean and SDs (SD).

	Week 28 (1.73 threshold)			Week 34 (1.28 threshold)			Week 38 (1.17 threshold)
Diagnostic scale	Normal	Elevated	p Value	Normal	Elevated	p Value	Normal	Elevated	p Value
Recall of objects immediate verbal, mean (SD)	142.9 (1.9)	130.7 (3.3)	0.002	140.5 (1.8)	136.1 (5.3)	0.438	139.7 (2.0)	130.3 (6.2)	0.151
Recall of objects immediate spatial,* mean (SD)	0.48 (0.07)	0.69 (0.05)	0.016	0.53 (0.04)	0.58 (0.12)	0.731	0.59 (0.05)	0.46 (0.13)	0.380
Recall of objects delayed verbal, mean (SD)	15.6 (0.25)	14.3 (0.43)	0.008	15.3 (0.2)	14.6 (0.7)	0.298	15.1 (0.2)	14.1 (0.8)	0.206
Recall of objects delayed spatial,* mean (SD)	0.52 (0.05)	0.67 (0.07)	0.108	0.55 (0.04)	0.64 (0.12)	0.530	0.62 (0.04)	0.55 (0.13)	0.604
Speed of information processing—ability score, mean (SD)	163.2 (3.1)	157.9 (5.2)	0.389	163.0 (2.7)	154.6 (8.0)	0.323	160.0 (3.0)	163.1 (9.3)	0.750
Recall of digits forward—ability score, mean (SD)	151.5 (1.8)	150.4 (3.0)	0.761	150.9 (1.6)	150.1 (4.7)	0.872	150.7 (1.8)	150.2 (5.7)	0.941
Recall of pictures—ability score, mean (SD)	123.8 (1.2)	120.7 (2.1)	0.209	122.8 (1.1)	123.9 (3.3)	0.752	121.3 (1.3)	130.3 (3.9)	0.030
Recall of digits backwards—ability score, mean (SD)	129.8 (1.7)	124.1 (2.8)	0.087	128.6 (1.5)	126.4 (4.4)	0.634	128.6 (1.7)	125.4 (5.3)	0.564

*Logistic regression, mean in these cases refers to the odds of an abnormal (low) recall score for a child at the mean age (12.1 years) with a mean Townsend score (1.79).