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This is a systematic review [
1. CR interventions seem to be quite different between studies, making future comparisons inappropriate (ie, for CR programs including exercise programs, I would expect improvements in cardiorespiratory fitness (CRF), while for programs including diet, this outcome might not change).
2. It is not clear how authors selected the papers. This process makes it difficult to understand the results, as the outcomes and types of interventions are quite different between studies. As the main outcome in CR is CRF, I would suggest making it your primary outcome for selection of the studies.
1. I would suggest including a PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) flow diagram for the study selection process. This is available at http://prisma-statement.org/prismastatement/flowdiagram.aspx.
2. Tables 2 and 3 are not clear.
cardiac rehabilitation
cardiorespiratory fitness
Preferred Reporting Items for Systematic Reviews and Meta-Analyses
None declared.