| Total analysis cohort (n = 308) | Low third trimester growth velocitya(n = 26) | Normal growth velocity (n = 282) | P |
---|---|---|---|---|
Age, years | 31.0 (4.2) | 31.9 (2.5) | 30.9 (4.3) | 0.23 |
Booking BMI, kg/m2 | 26.9 (24.4–30.1) | 24.8 (23.1–28.5) | 27.0 (24.6–30.1) | 0.02 |
Smoking status | ||||
 Current smoker  Ex-smoker  Never  Unknown | 5 (1.6%) 84 (27.3%) 218 (70.8%) 1 (0.3%) | 0 (0.0%) 4 (15.4%) 22 (84.6%) 0 (0.0%) | 5 (1.8%) 80 (28.4%) 196 (69.5%) 1 (0.4%) | 0.26 |
Gestational hypertension or preeclampsia | 42 (13.6%) | 5 (19.2%) | 37 (13.1%) | 0.37 |
GDM | 38 (12.3%) | 2 (7.7%) | 36 (12.8%) | 0.75 |
Onset of delivery | ||||
 Induction of labour  Spontaneous labour  No labour | 147 (47.7%) 139 (45.1%) 22 (7.1%) | 9 (34.6%) 16 (61.5%) 1 (3.8%) | 138 (48.9%) 123 (43.6%) 21 (7.4%) | 0.21 |
Mode of delivery | ||||
 Normal vaginal delivery  Instrumental delivery  Emergency caesarean  Elective caesarean | 117 (38.0%) 101 (32.8%) 70 (22.7%) 20 (6.5%) | 14 (53.8%) 7 (26.9%) 4 (15.4%) 1 (3.8%) | 103 (36.5%) 94 (33.3%) 66 (23.4%) 19 (6.7%) | 0.37 |
Birthweight, g | 3453 (431.0) | 3160 (396.8) | 3480 (424.6) | 0.0003 |
Customised birthweight centile | 49.9 (26.7–72.6) | 35.0 (22.7–42.8) | 52.9 (27.6–74.2) | 0.007 |
Gestational age at birth, weeks | 39.9 (38.9–40.6) | 39.7 (37.7–40.3) | 40.0 (39.0–40.7) | 0.03 |