Table 1 Clinical and demographic characteristics of 167 patients included in study cohort

Number of women

54

39

74

Maternal age, years

Median (range)

32 (17–46)

36 (27–45)

32 (20–44)

^†0.0044

BMI (kg/m²)

Median (range)

25.1 (17.7–35)

24.4 (18.7–39.4)

24.5 (18–38.4)

^†0.205

Smokers (%)

7 (13)

2 (5.1)

3 (3.7)

^††0.189

 White

30 (56)

24 (62)

54 (73)

^†††0.1271

 Asian

15 (28)

11 (28)

10 (13.5)

 Black

7 (13)

4 (10)

10 (13.5)

 Mixed

2 (3)

0 (0)

0 (0)

 0

30(55.6)

22 (56.4)

31 (42)

^††††0.0084

 1

9(16.7)

6 (15.3)

29 (39)

 2

9 (16.7)

7 (18)

10 (14)

  ≥ 3

6 (11)

4 (10.3)

4 (5)

 5–8 weeks

14 (26)

14 (36)

7 (10)

^†††0.0083

 8–10 weeks

24 (44)

19 (49)

41(55)

 10–14 weeks

16 (30)

6 (15)

26 (35)

 0

28

24

65

^†††0.0002

 1

13

11

9

 2

8

2

0

 3

3

2

0

 4

2

0

0

Missed

40

35

^†††0.1

Incomplete

4

0

Viable

10

4