| Type of Evidence | Description of Evidence |
| 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
Preventing and Mitigating Nurse Fatigue in Health Care
Healthy Work Environment Recommendations