Duggal 1998.

Study characteristics
Methods	RCT
Participants	244 women ASA 1‐2 undergoing elective CS under spinal anaesthesia with no hyperemesis or antiemetic use in the previous 48 hours.
Interventions	Intervention: acupuncture/acupressure (Comparison 8) Acupressure bands. N = 122. Comparator: placebo Sham acupressure bands. N = 122.
Outcomes	Nausea or vomiting intraoperative and up to 10 hours postoperatively.
Notes	Setting: BC Women’s Hospital and Health Centre Society, Vancouver, British Columbia, Canada. Dates: not reported. Funding source: Grant from BC Medcal Services Foundation and wristbands donated from Sea Band UK Limited. Declaration of interest: not reported.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Random number table.
Allocation concealment (selection bias)	Unclear risk	Method not reported.
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Quote:"group P a pair of similar‐looking placebo wristbands from which the plastic studs were missing"
Blinding of outcome assessment (detection bias) All outcomes	Low risk	The nature of the bands was therefore unknown to the patient, anaesthetist and investigators for the duration of the study
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Many exclusions ‐ not ITT.
Selective reporting (reporting bias)	Unclear risk	We did not assess the trial protocol.
Other bias	Low risk	No baseline imbalance.