Stein 1997.

Study characteristics
Methods	RCT
Participants	75 healthy pregnant women undergoing elective CS under spinal anaesthesia, without history of diabetes, morbid obesity previous postoperative nausea or vomiting, nausea or vomiting in the previous 24 hours.
Interventions	Intervention 1: acupuncture/acupressure (Comparison 8) Acupressure bands + 2 mL normal saline. N = 25. Intervention 2: dopamine antagonist (Comparison 2) Placebo bands and 10 mg metoclopramide. N = 25. Comparison: placebo Placebo bands and 2 mL normal saline. N = 25.
Outcomes	Hypotension, sedation, nausea and vomiting, Apgar score.
Notes	Setting: St. Luke's‐Roosevelt Hospital Center, New York, New York, USA. Dates: not reported. Funding source: not reported. Declaration of interest: not reported.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Quote: "prospectively randomised using envelope system."
Allocation concealment (selection bias)	Unclear risk	Quote: "prospectively randomised using envelope system."
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Quote: "Patients, anaesthesiologists, nurses and obstetricians were all blinded."
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Quote: "Patients, anaesthesiologists, nurses and obstetricians were all blinded."
Incomplete outcome data (attrition bias) All outcomes	Low risk	No loss to follow‐up.
Selective reporting (reporting bias)	Unclear risk	We did not assess the trial protocol.
Other bias	Low risk	None apparent.