Table 2.
Prediction of early preterm delivery in women with a triplet pregnancy
| Delivery <32 + 0 week (n = 37) | Delivery ≥32 + 0 week (n = 54) | Univariate analysis | Multivariate analysis | |||||
|---|---|---|---|---|---|---|---|---|
| OR (95% CI)a | Wald’s test | p (LR test)b | Adjusted OR (95% CI)a | Wald’s test | p (LR test)b | |||
| Age (years)c | 31.5 (26.8; 37.0) | 31.0 (27.0; 33.0) | 1.04 (0.95; 1.13) | 0.644 | 0.422 | – | – | – |
| Body mass index (kg/m2)c | 23.9 (20.6; 26.7) | 22.5 (21.0; 25.4) | 1.03 (0.91; 1.17) | 0.278 | 0.598 | – | – | – |
| Chorionicity (3 versus 1 or 2)d | 21 (80.8) | 35 (67.3) | 2.04 (0.66; 6.35) | 1.517 | 0.218 | |||
| Previous preterm delivery or second trimester miscarriaged | 4 (15.4) | 3 (5.8) | 2.97 (0.61; 14.41) | 1.825 | 0.177 | – | – | – |
| Previous conizationd | 1 (3.8) | 2 (3.8) | 1.00 (0.09; 11.57) | 0.000 | 1.000 | – | – | – |
| Pregnancy after IVF treatmentd | 16 (61.5) | 37 (71.2) | 0.65 (0.24; 1.75) | 0.731 | 0.392 | – | – | – |
| Parityd | ||||||||
| 0 | 18 (69.2) | 37 (71.2) | Reference | 1.706 | – | – | – | |
| 1 | 5 (19.2) | 13 (25.0) | 0.79 (0.24; 2.56) | 0.154 | 0.426 | – | – | – |
| ≥2 | 3 (11.5) | 2 (3.8) | 3.08 (0.47; 20.1) | 1.384 | – | – | – | |
| Cigarette smokingd | 3 (11.5) | 6 (11.5) | 1.00 (0.87; 1.15) | 0.000 | 1.000 | – | – | – |
| CLe at week 16 + 0 (mm)c | 35 (28; 39) | 38 (35; 41) | 0.93 (0.85; 1.01) | 3.146 | 0.058 | – | – | – |
| CLe at week 18 + 0 (mm)c | 35 (29; 41) | 40 (35; 44) | 0.93 (0.87; 1.01) | 3.381 | 0.066 | – | – | – |
| CLe at week 20 + 0 (mm)c | 33 (28; 42) | 40 (36; 45) | 0.90 (0.82; 0.98) | 6.276 | 0.012 f | 1.04 (0.84; 1.29) | 0.131 | 0.717 |
| CLe at week 22 + 0 (mm)c | 33 (17; 39) | 41 (36; 43) | 0.92 (0.68; 0.98) | 6.958 | 0.008 f | 1.01 (0.76; 1.36) | 0.006 | 0.937 |
| CLe at week 24 + 0 (mm)c | 21 (7; 30) | 38 (31; 42) | 0.91 (0.86; 0.97) | 9.873 | 0.002 f | 0.84 (0.68; 1.03) | 7.262 | 0.097 |
| CLe dynamics: week 22 + 0 to 24 + 0 (mm)c | −10.5 (−16.0; −1.6) | −2.5 (−7.0; 1.0) | 0.88 (0.79; 0.97) | 6.043 | 0.014 f | Excluded for redundancy | ||
Results of the univariate and multivariate analysis
aOR (95% CI) = odds ratio (95% confidence interval)
bLR test = likelihood ratio test
cContinuous variable, provided in median (interquartile range)
dNominal variable, provided in n (%)
eCL = cervical length
fItalic letters indicate statistical significance