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Table 4 Relative risk of measures of placental insufficiency when growth velocity cut-off thresholds dichotomise the cohort

From: Reduced growth velocity across the third trimester is associated with placental insufficiency in fetuses born at a normal birthweight: a prospective cohort study

Outcome Definition of low growth velocity Growth velocity RR (95% CI) if low velocity P
Low n (%) Not low n (%)
CPR < 5th centile (n = 305) EFW < –30 centiles 6/26 (23.1) 23/279 (8.2) 2.80 (1.25–6.25) 0.03
AC < –30 centiles 4/25 (16.0) 25/280 (8.9) 1.79 (0.68–4.74) 0.28
UA pH < 7.15 at birth (n = 241) EFW < –30 centiles 4/19 (21.1) 20/222 (9.0) 2.34 (0.89–6.14) 0.11
AC < –30 centiles 4/21 (19.0) 20/220 (9.1) 2.10 (0.79–5.56) 0.14
EFW < –35 centiles 4/13 (30.8) 20/228 (8.8) 3.51 (1.40–8.77) 0.03
AC < –35 centiles 4/15 (26.7) 20/226 (8.8) 3.01 (1.18–7.70) 0.049
ADP low body fat percentage (n = 137) EFW < –30 centiles 1/11 (9.1) 11/126 (8.7) 1.04 (0.15–7.34) 1.00
AC < –30 centiles 4/8 (50.0) 8/129 (6.2) 8.06 (3.07–21.16) 0.002
  1. AC abdominal circumference, ADP air displacement plethysmography, CI confidence interval, CPR cerebroplacental ratio, EFW estimated fetal weight, RR relative risk, UA umbilical artery