Sorensen 2015.

Methods	Single‐centre randomised superiority educational trial
Participants	Who: Shift working staff on the labour ward Number: 100 randomised Proportion of eligible staff participating: 249 eligible; 40% participation
Interventions	Intervention description: In situ multiprofessional obstetric anaesthesia training simulations Control: Off‐site training Location: Either in the delivery room/theatre or hospital rooms away from patient care location Delivered by: Representatives from the multidisciplinary working committee for the study Length: 1 day Duration: Single intervention
Outcomes	Outcomes: Safety Attitude Questionnaire Results Follow‐up: 4 to 6 weeks postintervention
Population studied	Description: Staff in the obstetric and anaesthetic departments of University of Copenhagen Number: 100
Funding Source	Danish Regions Development and Research Foundation, the Laerdal Foundation for Acute Medicine, and Aase and Ejnar Danielsen Foundation
Study Setting	Obstetrics and gynaecology department of Rigshospitalet, University of Copenhagen, Denmark
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Computerised and undertaken by trials unit
Allocation concealment (selection bias)	Low risk	Concealed from investigators
Blinding of participants and personnel (performance bias) All outcomes	High risk	Not possible
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Data managers, statisticians, and investigators blinded.
Incomplete outcome data (attrition bias) All outcomes	Low risk	Low amount of missing data
Selective reporting (reporting bias)	Low risk	All outcomes in protocol reported in trial.
Other bias	High risk	Possible contamination between intervention and control