Liu 2015a.

Study characteristics
Methods	RCT
Participants	Women elective CS under regional anaesthesia N = 90
Interventions	Intervention: acupoint electrostimulation transcutaneous acupoint electrostimulation N = Comparator 1: sham stimulation at a false point N = Comparator 2: placebo no intervention N =
Outcomes	Haemodynamics, VAS nausea score, plasma 5‐HT concentrations. Bleeding, administration of oxytocin, ephedrine and atropine
Notes	Setting: not stated but authors from Qingdao Regional Hospital, Shandong Province, China Dates: not reported Funding source: not reported Declaration of interest: not reported. Chinese paper with English abstract. No data for this review in the abstract.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Not described
Allocation concealment (selection bias)	Unclear risk	Not reported
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Sites covered with sticking plaster, but unclear if participants aware
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not described
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Unclear from abstract
Selective reporting (reporting bias)	Unclear risk	Unclear from abstract
Other bias	Unclear risk	Unclear from abstract