Risk factors for placenta accreta/increta/percreta.

*Percentage of individuals with complete data.¥Includes myomectomy, dilation & curettage, surgical termination of pregnancy, evacuation of retained products of conception & manual removal of placenta.‡Adjusted for all factors in the table apart from socio-economic group, previous caesarean uterine incision type(s), previous uterine perforation and interval between last caesarean section and last menstrual period. When adjusting for age, BMI and parity, these variables have been treated as a continuous linear term in the analysis.