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