Table 5. Comparison of AUCs between CL and other models for the prediction of sPTD (< 37 weeks) in subjects with CL ≥ 1.5 cm (n = 110).
| Variables | AUC | P valuea |
|---|---|---|
| CL | 0.5411 | - |
| ECI within 0.5 cm | 0.6743 | 0.286 |
| ECI within 1.0 cm | 0.6948 | 0.216 |
| ECI within 1.5 cm | 0.6996 | 0.213 |
| GA at CL | 0.6698 | 0.172 |
| PreBMI, kg/m2 | 0.6842 | 0.113 |
| CL + ECI within 0.5 cm | 0.6812 | 0.155 |
| CL + ECI within 1.0 cm | 0.7008 | 0.115 |
| CL + ECI within 1.5 cm | 0.7034 | 0.119 |
| CL + GA at CL + preBMI | 0.7153 | 0.047 |
| CL + GA at CL + preBMI + ECI within 0.5 cm | 0.7958 | 0.003 |
| CL + GA at CL + preBMI + ECI within 1.0 cm | 0.8256 | < 0.001 |
| CL + GA at CL + preBMI + ECI within 1.5 cm | 0.8201 | < 0.001 |
P values less than 0.05 are shown in bold.
AUC = area under receiver operating characteristic curve, CL = cervical length, ECI = elasticity contrast index, GA at CL = gestational age at cervical length measurement, preBMI = pre-pregnancy body mass index.
aComparison between CL alone and other models.