Gunes 2014.

Methods	Randomised, controlled trial. The purpose of this study is to compare two different remifentanil PCA protocols (bolus and bolus + infusion) with intramuscular meperidine for labour analgesia. The study was conducted in Cukurova University Medical Faculty, Turkey. There are no details when the study was conducted. Trial identifier: NA
Participants	Inclusion criteria: pregnant women, ASA I‐II, mean gestational age of 270 ± 10 days, planned for vaginal delivery Exclusion criteria: gestational pathology, obesity (BMI > 40 kg/m2), high risk cases (pre‐eclampsia, severe asthma, insulin‐dependent diabetes, hepatorenal disease), history of opioid allergy, long‐term opioid use or chronic pain
Interventions	remifentanil PCA bolus versus remifentanil PCA bolus + infusion versus meperidine IM
Outcomes	pain‐comfort and sedation scores, remifentanil consumption, side effects, Apgar scores
Notes	NA