Table 2 Quality checklist
Checklist for quality assessment and scoring of nonrandomized studies | |
|---|---|
Selection | 1. Assignment for treatment-Any criteria reported (if yes, 1 star)? |
2. How representative was the reference group (CPB) in comparison to the general population for CABG? (If yes, 1 star, no star if the patients were selected or selection of group was not described.) | |
3. How representative was the treatment group (OPCAB) in comparison to the general population for CABG? (If drawn from the same community as the reference group, 1 star, no star if drawn from a different source or selection of group was not described.) | |
Comparability | 4. Group comparable for 1, 2, 3, 4, 5. (If yes, 1 star was assigned for each of these characteristics. No star was assigned if the two groups differed.) |
5. Group comparable for 6, 7, 8, 9, 10. (If yes, 1 star was assigned for each of these characteristics. No star was assigned if the two groups differed.) | |
Outcome assessment | 6. Clearly defined outcome of interest. (If yes, 1 star for information ascertained by record linkage or interview, no star if this information was not reported.) |
7. Follow-up (1 star if described.) | |
Comparability variables: (1) Age; (2) Gender; (3) Hypertension; (4) Diabetes; (5) Ejection fraction; (6) 3-Vessel Disease; (7) Left Main Stem Disease; (8) Urgent or Emergent Operation; (9) Viability Studies; (10) Surgeon or Hospital Volume | |