Weidman 2010.

Methods	Randomised interventional cluster trial
Participants	Who: Postgraduate year 2 internal medicine residents Number: 30 eligible to be randomised, 14 randomised to intervention Proportion of eligible staff participating: Implies all participated
Interventions	Intervention description: Resuscitation training plus simulation Control: Resuscitation training alone Location: Simulation laboratory Delivered by: Faculty delivered Length: 4 hours Duration: Single session
Outcomes	Outcomes: Compression rate, depth, ventilation rate, no‐flow fraction, pre‐ and post‐shock pause, appropriate shocks, survival to hospital discharge, and return of spontaneous circulation Follow‐up: 8 months
Population studied	Description: Resuscitation attempts at the study hospital Number: 98 cardiac arrests
Funding Source	National Institutes of Health Agency for Healthcare Research and Quality
Study Setting	An academic tertiary care hospital in the USA
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Computerised random number generation
Allocation concealment (selection bias)	Low risk	Predetermined rules as to allocation post‐randomisation
Blinding of participants and personnel (performance bias) All outcomes	High risk	Not possible to blind participants
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Study personnel blinded to training.
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	No discussion
Selective reporting (reporting bias)	High risk	Reported more outcomes than mentioned in methods
Other bias	High risk	Possible contamination between intervention and control