Risk factors for maternal and perinatal mortality among women undergoing cesarean section in Lubumbashi, Democratic Republic of Congo II

Introduction: The objective was to analyze risk factors for maternal and perinatal mortality among women undergoing cesarean section in Lubumbashi, Democratic Republic of Congo (DRC). Methods: We conducted a multicenter study of 3643 women undergoing cesarean sections between 1 January 2009 and 31 December 2013 out of 34199 women delivering in five general referral hospitals in Lubumbashi (DRC). Sociodemographic data, indications, obstetrical environment as well as maternal and perinatal morbi-mortality were analyzed using Epi Info 2011 software. Computed frequencies were expressed in percentage and mean values were expressed in terms of standard deviations. Chi-square test and Fisher’s exact test, when recommended, were used to compare frequencies. The odds ratio was calculated using Cornfield 95% confidence interval based on a logistic regression model in order to determine the strength of risk factors. Threshold significance level was set at p < 0.05. Results: The frequency of cesarean sections was 10.65%. The average age of women undergoing cesarean section was 28.83 ± 6.8 years (with a range from 14 to 49 years). Parity ranged from 1 to 16 with an average of 2.6. 1 out of 9 (10.9%) women undergoing cesarean section were patients with previous caesarean section uterine scar on the anterior wall of the uterus and 22.3% of women were patients with previous obstetric evaquation. Maternal and perinatal mortality rate was 1.4% and 7.07% during cesarean section respectively. The analysis of risk factors shows that the great multiparity (=5), the absence of monitoring during pregnancy, the urgent nature of emergency surgery significantly affect maternal mortality. Other factors for perinatal mortality included advanced maternal age (>35 years), patients referral from one facility to another as a mode of admission and fetal immaturity. Conclusion: This study shows that cesarean section in our working condition is associated to a significant maternal and perinatal mortality. Identified risk factors are largely preventable, because they are rightly or wrongly ascribed to cesarean section glossing over, ipso facto, the often irrational circumstances of its practice.