Variable/outcome on individual level (N = 100) | Research hypothesis: experimental group versus control group | Outcome measure | Type of variable | Methods of statistical analysis |
---|---|---|---|---|
Primary outcome | Â | Â | Â | Â |
Multiple choice questions | Improvement occurs in the experimental group | Percentage correct in 40 multiple choice questions | Will be analyzed as interval data, a Gaussian distribution is expected | Parametric techniques |
 | ANOVA | |||
Exploratory outcome | Â | Â | Â | Â |
Safety Attitudes Questionnaire | Increased score in the experimental group | 33 items on a 5-point scale. Divided into 6 dimensions | Will be analyzed as interval data, a Gaussian distribution is expected | Parametric techniques |
ANOVA | ||||
Data are converted to the 100-point scale | Â | Chi-square tests | ||
Stress-Trait Anxiety Inventory Baseline | Increased peak score in the experimental group | Inventory 20 item (interval 20 to 80). | Will be analyzed as interval data, a Gaussian distribution is expected | Parametric techniques |
ANOVA | ||||
Stress-Trait Anxiety Inventory 1 | ||||
Stress-Trait Anxiety Inventory 2 | ||||
Cognitive appraisal A Baseline | Increased peak score in the experimental group | Likert scale 1 (10 point)/Likert scale 2 (10 point) (interval 1/10 to 10) | Ordinal data | Non-parametric techniques |
Cognitive appraisal 1 | Mann Whitney U test | |||
Cognitive appraisal 2 | ||||
Test for salivary cortisol Baseline | Increased salivary cortisol level from baseline to peak in the experimental group | Cortisol level in nmol/l | Interval data | Parametric techniques |
Test for salivary cortisol 1 | ANOVA | |||
Test for salivary cortisol 2 | ||||
Test for salivary cortisol 3 | ||||
Evaluation questionnaire | Increased positive evaluation in the experimental group | 20 questions on a 5-point Likert scale | Ordinal data | Non-parametric techniques |
Treated as ordinal data at the item level | ||||
Intrinsic Motivation Inventory | Increased score in the experimental group | Task evaluation inventory 22 items on a 7-point scale. Divided into 4 dimensions | Ordinal data | Non-parametric techniques |
Mann Whitney U test | ||||
Variables on team-level | Â | Â | Â | Â |
(N = 10 teams) | ||||
Team Emergency Assessment Measure | Improved outcome in the experimental group | Video assessment on a 5-point scale (0 to 5) of 11 questions (0 to 44) 10 points scale for global rating of the team | Ordinal data | Non-parametric techniques |
 | Mann Whitney U test | |||
Selected clinical measures | Improved outcome in the experimental group | Minutes before decision making about operation, minutes before operation initiated. Medication given yes/no | Interval data | Parametric techniques |