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Table 1 Maternal characteristics and delivery outcomes – maternal characteristics and delivery outcomes of participants overall and comparison between low third trimester growth velocity and the remainder of 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

  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
  1. Data presented as mean (standard deviation) or median (interquartile range) depending on distribution for continuous variables, and as number (%) for categorical variables
  2. BMI body mass index, GDM gestational diabetes mellitus
  3. aLow third trimester growth velocity is an EFW growth velocity of < –30 centiles over 8 weeks