Table 1

Demographic characteristics of study cohort at 28 weeks’ gestation in the normal (<90th centile) and elevated (>90th centile) umbilical artery Doppler (UAD) pulsatility index (PI) reported as mean with SDs (SD) or percentages, respectively

UAD PI<90th centile
N=140
UAD PI>90th centile
N=40
All individuals
N=180
Gender (male)36 (54%)27 (44%)63 (49%)
Age of child (years)12.4 (0.5)12.4 (0.4)12.4 (0.5)
Age of mother (years)40.5 (5.3)39.9 (5.8)40.2 (5.6)
Weight (kg)44.1 (10.3)45.5 (11.7)44.9 (11.1)
Height (cm)151.6 (7.7)151.0 (7.6)151.3 (7.6)
Townsend score1.66 (3.44)1.66 (3.45)1.66 (3.4)
Tanner public hair staging
 132 (49%)29 (48%)61 (48%)
 215 (23%)15 (25%)30 (24%)
 35 (8%)8 (13%)13 (10%)
 413 (20%)7 (12%)20 (16%)
 51 (2%)1 (2%)2 (2%)
11+ grade=pass39 (59%)42 (69%)81 (64%)
Maternal smoking44 (33%)15 (37%)59 (34%)
Mode of delivery
 Normal (SVD)112 (81%)31 (76%)143 (79%)
 Assisted breech1 (1%)1 (2%)2 (1%)
 Instrumental15 (11%)3 (7%)18 (10%)
 Caesarean section11 (8%)6 (15%)17 (9%)
Birth weight (g)3679 (586)3429 (426)3532 (511)
Gestation (weeks+days)40+3 (1+0)40+1 (1+0)40+2 (1+0)
APGAR 1 min8 (7, 9)8 (7, 9)8 (7, 9)
APGAR 5 min9 (9, 9)9 (9, 9)9 (9, 9)
Cord pH7.29 (0.14)7.30 (0.09)7.29 (0.11)
PI 28 weeks0.95 (0.06)1.69 (0.29)1.34 (0.43)
PI 34 weeks0.96 (0.19)1.06 (0.20)1.02 (0.20)
PI 38 weeks0.90 (0.20)1.03 (0.15)0.97 (0.18)