Mode of delivery (vaginal vs. caesarean) according to maternal characteristics, obstetric variables and 10-Group classification.

Data are expressed in number, percentage and crude Risk Ratios – 95% confidence interval (bivariate analysis). RR, risk ratios; CI, confidence interval; BMI, body mass index; CD, caesarean delivery; ceph, cephalic; Nlp, nulliparous; Mlp, multiparous; spont, spontaneous; ind, induced; lab; labor; wks, weeks. *No past caesarean delivery. p<0.05 is considered statistically significant.