Gataure 1995.

Methods	Prospective, randomized clinical trial
Participants	N = 100, spontaneously breathing patients undergoing urological surgery. Patients < 18 years of age and those at risk of regurgitation were excluded
Interventions	Type of LMA: LMA Classic Early removal ‐ The LMA was removed by anaesthetist in OR while deeply anaesthetized ‐ N2O and enflurane were not turned off until after removal of laryngeal mask Late removal ‐ The LMA was removed by recovery nurse when patient responded to commands
Outcomes	Coughing Desaturation (cut‐off not defined) Biting Retching Vomiting Excessive salivation Airway obstruction Regurgitation before and after removal of the LMA
Notes	Induction ‐ alfentanil + propofol Maintenance ‐ N2O + O2 + enflurane, Bain's circuit and spontaneous breathing
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	"Patients randomly allocated" COMMENT ‐ No information on the method of generation of allocation sequence
Allocation concealment (selection bias)	Unclear risk	COMMENT ‐ No information on the method of allocation concealment
Blinding (performance bias and detection bias) Of outcome assessor to all outcomes	High risk	Not done
Incomplete outcome data (attrition bias) All outcomes	Low risk	COMMENT ‐ Outcomes reported for all 100 patients recruited
Selective reporting (reporting bias)	Low risk	COMMENT ‐ Though no explicit statement, the outcomes mentioned in methodology have been reported