Thomas 2012.

Methods	Randomized controlled trial
Participants	N = 216, children aged 1 to 16 years, ASA I‐II, undergoing non‐airway surgery.
Interventions	Four groups for LMA removal ‐ Group 1: early removal in lateral position; Group 2: late removal in lateral position; Group 3: early removal in supine position; Group 4: late removal in supine position Early removal ‐ The LMA was removed in deep plane of anaesthesia Late removal ‐ The LMA was removed when the patients were awake after anaesthesia
Outcomes	Laryngospasm Desaturation Upper airway obstruction Vomiting Excessive secretions Biting the stem of the LMA
Notes	This trial is published as an abstract. There is no contact information for the authors
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	COMMENT ‐ The details of randomization process are not specified
Allocation concealment (selection bias)	Unclear risk	COMMENT ‐ Allocation concealment not specified
Blinding (performance bias and detection bias) Of outcome assessor to all outcomes	Unclear risk	COMMENT ‐There is no mention of the blinding of the observer
Incomplete outcome data (attrition bias) All outcomes	Low risk	COMMENT ‐ 216 patients were enrolled, 4 patients were excluded for anaesthetic reasons and outcome data are reported in 212 patients
Selective reporting (reporting bias)	Unclear risk	COMMENT ‐ 6 outcome variables are mentioned in methodology while three of them are not reported in the results. It is unclear if the variable "Number of complications" includes all of them