Sharma 2007.

Methods	Parallel‐group randomized trial, conducted in India. Study dates not reported.
Participants	60 women undergoing laparoscopic cholecystectomies under general anaesthesia. Exclusion: obesity, previous history of PONV and motion sickness.
Interventions	Group 1: ondansetron 4 mg IV given 10 min after induction of anaesthesia (n = 20). Group 2: bilateral P6 acupuncture 5 min before induction of anaesthesia. Intermittent stimulation was given at P6 acupoints by rotating needle clockwise and anticlockwise up to 30 min (n = 20). Group 3: combination of group 1 and group 2 interventions (n = 20).
Outcomes	Nausea (0 ‐ 7 h), vomiting (0 ‐ 7 h), risk of rescue antiemetic drug (0 ‐ 7 h), risk of adverse effects.
Notes	Rescue antiemetic was metoclopramide 10 mg IV. No pain, bleeding, vasovagal attack, or broken acupuncture needles noted in any of the groups. No details about funding source or any declarations of interest among authors.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Insufficient information.
Allocation concealment (selection bias)	Unclear risk	Insufficient information.
Blinding of patients (performance bias) All outcomes	High risk	"Blinding of any form was not possible because acupuncture needles had to be kept in situ in the operating room".
Blinding of healthcare providers (performance bias) All outcomes	High risk	"Blinding of any form was not possible because acupuncture needles had to be kept in situ in the operating room".
Blinding of outcome assessor (detection bias) All outcomes	High risk	"Blinding of any form was not possible because acupuncture needles had to be kept in situ in the operating room".
Incomplete outcome data (attrition bias) All outcomes	Low risk	No missing data reported for 60 women analysed.
Selective reporting (reporting bias)	Low risk	All expected outcomes reported.
Other bias	Low risk	Baseline characteristics were comparable. "There was no significant difference among the patients in both the groups regarding weight, age, height, gender, hours of preoperative fasting and duration of anesthesia and surgery...".