From: Guidance to best tools and practices for systematic reviews
Preferred | Potentially problematic |
---|---|
Evidence synthesis with meta-analysis Systematic review with meta-analysis | Meta-analysis |
Overview or umbrella review | Systematic review of systematic reviews Review of reviews Meta-review |
Randomized | Experimental |
Non-randomized | Observational |
Single case experimental design | Single-subject research N-of-1 design |
Case report or case series | Descriptive study |
Methodological quality | Quality |
Certainty of evidence | Quality of evidence Grade of evidence Level of evidence Strength of evidence |
Qualitative systematic review | Qualitative synthesis |
Synthesis of qualitative dataa | Qualitative synthesis |
Synthesis without meta-analysis | Narrative synthesisb, narrative summary Qualitative synthesis Descriptive synthesis, descriptive summary |