Univariate analysis | Multivariate analysis | ||||||||
---|---|---|---|---|---|---|---|---|---|
Delivery <35 week (n = 5) | Delivery ≥35 week (n = 27) | OR (95 % CI)a | P | P | Adjusted OR (95 % CI) a | P | P | ||
(Wald’s test) | (LR test)b | (Wald’s test) | (LR test)b | ||||||
Age (years)c | 31 (29;39) | 31 (29;35) | 1.09 (0.89;1.34) | 0.413 | 0.401 | - | - | - | |
Body mass index (kg/m2)c | 23.2 (19.6;24.4) | 25.7 (21.4;29.4) | 0.84 (0.65;1.09) | 0.191 | 0.124 | - | - | - | |
Previous preterm deliveryd | 2 (40.0) | 9 (33.3) | 1.33 (0.19;9.47) | 0.774 | 0.775 | - | - | - | |
Previous second trimester miscarriaged | 4 (80) | 22 (81.5) | 1.27 (0.10;34.76) | 1.000 | 1.000 | - | - | - | |
Previous conizationd | 1 (20.0) | 2 (7.4) | 3.12 (0.23,43.02) | 0.394 | 0.420 | - | - | - | |
Pregnancy after IVF treatmentd | 0 | 0 | - | - | - | - | - | - | |
Urinary tract infection during pregnancyd | 0 | 1 (3.7) | 0 (0;inf) | 0.995 | 0.557 | - | - | - | |
Parityd | 0 | 2 (40.0) | 5 (18.5) | 0.63 (0.19,2.06) | 0.447 | 0.583 | - | - | - |
1 | 1 (20.0) | 9 (33.3) | 0.28 (0.02;3.88) | 0.341 | - | - | - | ||
≥2 | 2 (40.0) | 13 (48.2) | 0.38 (0.04;3.52) | 0.398 | - | - | - | ||
Cigarette smokingd | 1 (20.0) | 4 (14.8) | 1.44 (0.13;16.41) | 0.770 | 0.750 | - | - | - | |
Gestational age at cerclagec | 15 (14;18) | 16 (14;17) | 1.02 (0.58;1.82) | 0.941 | 0.942 | - | - | - | |
CLe before cerclage (mm)c | 33 (31;35) | 37 (34;40) | 0.82 (0.65;1.04) | 0.098 | 0.066 | 1.06 (0.95,1.19) | 0.283 | 0.260 | |
CLe after cerclage (mm)c | 30 (19;33) | 42 (35;47) | 0.72 (0.51;1.01) | 0.055 | <0.001 f | 0.85 (0.75;0.96) | 0.007 | 0.004 f | |
Decrease in CLe after cerclaged | 4 (80.0) | 5 (18.5) | 17.6 (1.60;193.34) | 0.019 | 0.008 f | Not included due to redundancy | |||
CLe at the 20 gestational week (mm)c | 30 (19;31) | 40 (29;45) | 0.91 (0.83;1.01) | 0.069 | 0.046 f | 1.01 (0.90:1.14) | 0.875 | 0.876 | |
CLe at the 22 gestational week (mm)c | 19 (12;25) | 38 (26;43) | 0.89 (0.79;0.99) | 0.049 | 0.019 f | 0.94 (0.86;1.03) | 0.170 | 0.157 |