|
Age (years)c
|
31 (29;36)
|
32 (27;38)
|
0.828
|
|
Body mass index (kg/m2)c
|
24.1 (20.9; 28.5)
|
22.2 (21.1;26.4)
|
0.604
|
|
Previous preterm deliveryd
|
40 (45.5)
|
15 (45.5)
|
1.000
|
|
Previous second trimester miscarriaged
|
59 (67.0)
|
20 (60.6)
|
0.508
|
|
Previous conizationd
|
15 (17.0)
|
4 (12.1)
|
0.587
|
|
Pregnancy after IVF treatmentd
|
5 (5.7)
|
4 (12.1)
|
0.254
|
|
Urinary tract infection during pregnancyd
|
2 (2.3)
|
3 (9.1)
|
0.124
|
|
Parity
|
0
|
19 (21.6)
|
8 (24.2)
|
0.932
|
| |
1
|
31 (35.2)
|
11 (33.3)
|
| |
≥2
|
38 (43.2)
|
14 (42.4)
|
|
Cigarette smokingd
|
15 (17.0)
|
3 (9.1)
|
0.392
|
|
Gestational age at cerclagec
|
16 (16;18)
|
16 (16;18)
|
0.496
|
