LAUSR

OBJECTIVES To assess the rate of cesarean delivery at Basurto University Hospital (Bilbao, Spain) between 2015 and 2017 and to determine the cause of an increase in this rate during 2017. METHODS We retrospectively reviewed 6975 deliveries between 2015 and 2017, classifying women using the Robson classification. We analyzed extended perinatal mortality and perinatal outcomes during the study period and performed a comparative analysis of cesarean deliveries by year and Robson group. Comparisons were made with analysis of variance and χ2 or Fisher's exact tests. RESULTS During the study period, 928 cesarean deliveries (13.30%) were performed. Extended perinatal mortality in this period was 7.0%. We detected an increase in the rate of cesarean delivery in 2017 in Group 1 women (P = 0.0224), with significant differences in the homogeneity of the distribution of cesarean deliveries performed for fetal distress between years in this group (P = 0.0093). Auditing the cases of cesareans performed for fetal distress in Group 1 in 2017, we found that the indication was appropriate in all cases, but in 39.39%, the management of uterine contractions during labour was considered suboptimal. CONCLUSION Classifying cesarean deliveries using the Robson classification allows us to compare cesarean rates in different years and analyze any increases in these rates. Increases are sometimes attributed to changes in the obstetric population, but when investigated may be found to be related to potentially correctable problems. It is not necessary to have a high rate of cesarean delivery to warrant internal audit.