Registered Nurses' Association of Ontario

Levels of Evidence

Type of Evidence Description
A Evidence obtained from controlled studies, meta-analyses
A1 Systematic Review
B Evidence obtained from descriptive correlational studies
C Evidence obtained from qualitative research
D Evidence obtained from expert opinion
D1 Integrative Reviews
D2 Critical Reviews

 

Healthy Work Environment
Workplace Health, Safety and Well-being of the Nurse
Healthy Work Environment Recommendations