Table 1: Characteristics of the study group.

 

Delivery < 37 wks

(n = 141)

Delivery < 34

wks

(n = 14)

Delivery

34-37 wks (n = 25)

Delivery

< 37 wks

(n = 39)

Age

30 (19-43)

29 (22-41)

30 (18-42)

30 (18-42)

 

 

p > 0.05

p > 0.05

p > 0.05

Smoking

15 (10.6%)

6 (43%)

9 (36%)

15 (38%)

 

 

p < 0.05

p < 0.05

p < 0.05

BMI

22.4 (17.1-42.5)

18.8 (17.3-27.9)

19.4 (17-33.5)

19.4 (17-33.5)

 

 

p < 0.05

p < 0.05

p < 0.0001

Previous preterm delivery

19 (13.5%)

7 (50%)

7 (28%)

14 (35.9%)

 

 

p < 0.05

p > 0.05

p < 0.05

Parity

1 (1-5)

1.5 (0-3)

1 (1-2)

1 (0-3)

 

 

p > 0.05

p > 0.05

p > 0.05

Number of miscarriages

0 (0-3)

0 (0-1)

0 (0)

0 (0-1)

 

 

p > 0.05

p > 0.05

p < 0.05

Induction of ovulation

10 (7.1%)

0 (0%)

0 (0%)

5 (12.8%)

 

 

p > 0.05

p > 0.05

p > 0.05

In vitro

3 (2.1%)

0 (0%)

5 (20%)

0 (0%)

 

 

p > 0.5

p > 0.05

p > 0.05

Spontaneous

1 (0-3)

1 (1-1)

1 (0-1)

1 (0-1)

 

 

p > 0.05

p > 0.05

p > 0.05