Iqbal 2012.

Methods	Parallel‐group randomized trial conducted in Pakistan from November 2011 to July 2012.
Participants	60 participants aged 40 ‐ 60 years, ASA I and II, undergoing laparoscopic surgery. Exclusion: those with a history of severe adverse reactions to NSAIDs, bronchial asthma, kidney or liver dysfunction, bleeding disorders or history of steroids intake within 24 h of surgery.
Interventions	Group 1: acupressure wristband (Seaband) at the P6 acupoint to each wrist and draped with dressing during the stay in hospital.by an elastic bandage (n = 20). Group 2: sham acupressure (Seaband) on dorsal side of both forearms and draped with dressing during the stay in hospital (n = 20). Group 3: no treatment (n = 20).
Outcomes	Nausea (0 ‐ 24 h), vomiting (0 ‐ 24 h), risk of rescue antiemetic drug (metoclopramide 10 mg IV).
Notes	No treatment data were excluded from analysis. No power calculation done. 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 details.
Allocation concealment (selection bias)	Unclear risk	Insufficient details.
Blinding of patients (performance bias) All outcomes	Low risk	Authors made efforts to drape dressing over active and sham wristbands.
Blinding of healthcare providers (performance bias) All outcomes	Low risk	"The doctors and nurses giving anesthesia and the nurses on the postoperative ward, although aware that stimulation was being performed were not aware of the location of PC6".
Blinding of outcome assessor (detection bias) All outcomes	Low risk	"The doctors and nurses giving anesthesia and the nurses on the postoperative ward, although aware that stimulation was being performed were not aware of the location of PC6".
Incomplete outcome data (attrition bias) All outcomes	Low risk	No missing data were reported for the 60 participants analysed.
Selective reporting (reporting bias)	Low risk	All expected outcomes reported.
Other bias	Low risk	Demographic data appear similar between acupressure and sham groups.