Fig. 1From: Intrathecal morphine versus epidural ropivacaine infusion for analgesia after Cesarean section: a retrospective studyCumulative probability of rescue analgesic use after Cesarean delivery. There was no significant difference in the cumulative probability of rescue analgesic use within 48 h of Cesarean delivery in patients receiving single-shot spinal analgesia (ITM group) and combined spinal–epidural anesthesia followed by opioid-free epidural analgesia (CSEA-EDA group, p = 0.138 by log-rank test)Back to article page