Supporting information
Table S1 – Comparison of socio-demographics and obstetrics characteristics between the cohort and P5 trial screening phase (only singleton pregnancies)
Table S2 - Multivariate logistic regression analysis for total and sPTB at different gestational ages
Table S3 – Cervical length x PTB with adjusted OR for BMI, comorbidities, obstetrical history, funneling and sludge (tables S3.1, S3.2 and S3.3)
Table S4 – TVU measurement of CL performance for predicting preterm birth
Figure S1 – Patient enrolment flowchart
Figure S2– Kaplan-Meyer survival analysis for sPTB considering different ranges of CL