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Table 3 Maternal characteristics and delivery outcomes of participants overall and comparison between low growth velocity (20–36-week EFW velocity < −30 centiles) and the remainder of the cohort

From: Reduced growth velocity from the mid-trimester is associated with placental insufficiency in fetuses born at a normal birthweight

  Total analysis cohort (n = 305) Low growth velocity (n = 67) Normal growth velocity (n = 238) P
Age (years) 30.9 (4.2) 31.1 (4.2) 30.9 (4.2) 0.70
Booking BMI (kg/m2) 23.7 (21.5–26.9) 22.4 (20.9–26.2) 23.9 (21.8–27.1) 0.02
Current smokers 5 (1.6%) 1 (1.5%) 4 (1.7%) 1.00
Gestational diabetes 37 (12.1%) 10 (14.9%) 27 (11.3%) 0.40
Onset of delivery
 Spontaneous labour 136 (44.6%) 31 (46.3%) 105 (44.1%) 0.62
 Induction labour 147 (48.2%) 33 (49.3%) 114 (47.9%)
 No labour 22 (7.2%) 3 (4.5%) 19 (8.0%)
Mode of delivery
 Normal vaginal delivery 115 (37.7%) 32 (47.8%) 83 (34.9%) 0.15
 Instrumental delivery 100 (32.8%) 22 (32.8%) 78 (32.8%)
 Emergency caesarean section 70 (23.0%) 10 (14.9%) 60 (25.2%)
 Elective caesarean section 20 (6.6%) 3 (4.5%) 17 (7.1%)
GA at delivery (weeks) 40.0 (38.9–40.6) 39.7 (38.4–40.4) 40.0 (39.0–40.7) 0.04
Birthweight (g) 3453 (431.6) 3135 (312.3) 3543 (418.5) < 0.0001
Birthweight centile 49.8 (26.7–71.8) 27.8 (15.8–36.4) 58.2 (32.4–77.5) < 0.0001
  1. Data presented as mean (standard deviation) or median (interquartile range) depending on distribution for continuous variables and as number (%) for categorical variables
  2. Some percentages do not sum to 100% due to rounding to one decimal place
  3. BMI body mass index, GA gestational age