Statistical analysis
labor pain, NRS, pain
The primary objective was the association between labor pain intensity and acute postpartum pain at 0 to 24 h after delivery. The primary exposure of labor pain intensity (A-LPQ total and subscale scores) would be treated as continuous variable; whereas the primary outcome of acute postpartum pain would be in binary form: “high acute postpartum pain” for those who scored NRS ≥ 3 of 10 at 0 to 24 h after delivery, and “low acute postpartum pain” for those with NRS < 3 of 10. A NRS cut-off of 3 is considered clinically relevant as patients who score 3 and above would require medical intervention to relieve pain as per clinical practice, including our institution [