Table 2 Modified rating scheme and results for N = 168 articles
Classification | Definition | Grade | Results |
|---|---|---|---|
Systematic Review | Documented extensive literature search; quantitative or qualitative summary | A | 9 |
Narrative Review | Summary of field or problem by an expert citing references obtained in a non-systematic manner | B | 49 |
RCT | Prospectively randomized at individual or group level | C | 3 |
Observational Studies | Formal design, almost always a control group whether prospective or retrospective, and whether cross-section, panel, or case-control. Includes analysis of large dataset analysis. | D | 29 |
Mathematical Models | Uses mathematical language to describe and predict biomedical and epidemiologic outcomes. | E | 12 |
Case Reports or Series | Report of a (hopefully pertinent) case or series of cases, often with a perspective on the current state of affairs or the current literature | F | 30 |
Diagnostic Test Studies | Studies of the laboratory or filed performance of a diagnostic test. Generally compare sensitivity and specificity to some gold standard | G | 0 |
Evidence Based guidelines | Guidelines developed by bodies after review of the literature | H | 9 |
Expert Opinion, Editorials & Commentaries | Opinion or "newsy" narratives | I | 27 |
TOTAL | Â | Â | 168 |