*Ineligible for planned VBAC or did not meet other eligibility criteria for study because of one or more of the following: noncephalic presentation at delivery (n = 6,100), placenta previa (n = 570), abdominal pregnancy (n = 1), known or suspected disproportion of maternal and/or fetal origin (n = 113), tumor of corpus uteri (n = 268), birth by prelabor nonelective cesarean section (n = 5,954), antepartum stillbirth (n = 131), stillbirth missing time of death in relation to birth (n = 7), missing information on mode of delivery (n = 10); delivering by nonelective cesarean section missing information about duration of labor (n = 1,291), and number of previous cesarean sections greater than parity (n = 243). Reasons are not mutually exclusive. aNumbers provided by ISD Scotland. CHI, community health index; ISD, Information Services Division; NRS, National Records of Scotland; SMR02, Scottish Morbidity Record Maternity Inpatient and Day Case dataset; VBAC, vaginal birth after previous cesarean.