Ogica 2007.

Methods	Randomized controlled trial
Participants	Setting: Bucharest, Romania. Centre for bone marrow, liver and renal transplant (web site information), ICU and staffing not reported Participants: 103 participants (51 intervention group, 52 control group) Conditions: Surgical (abdominal) and myasthenia gravis Inclusion: Not reported Exclusion: Not reported
Interventions	Intervention: Readiness to wean criteria and SBT (communication) Control: Not reported (classical ventilator disconnection)
Outcomes	1. Duration of MV 2. ICU length of stay 3. Reintubation 4. Mortality
Notes	Protocol registration not reported. The study was reported in a conference abstract and details on ITT, sample size calculation, ethics and trials methods are not reported. We were unable to contact the primary author for details, but managed to contact a co‐author who sent a data file, but could not elaborate further on study details. Data entered into the meta‐analyses were calculated from the raw data sent by a co‐author
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Not reported
Allocation concealment (selection bias)	Unclear risk	Not reported
Blinding of participants and personnel (performance bias) All outcomes	High risk	Impossible to blind personnel to the intervention groups
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not reported
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Not reported
Selective reporting (reporting bias)	Low risk	No study protocol, but usual outcomes reported
Other bias	Unclear risk	Abstract lacks detail to confirm