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Table 2 Comparison of methods of original review. RCT: randomised controlled trial

From: A review of the quantitative effectiveness evidence synthesis methods used in public health intervention guidelines

Number of guidelines (%)

Original review (39 guidelines)

Updated review (45 guidelines)

No review

1 (3%)

2 (4%)

Narrative review only

29 (74%)

27 (60%)

Meta-analysis

9 (23%)

14 (31%)

Cost effectiveness review

38 (97%)

33 (73%)

Decision model

35 (90%)

34 (76%)

Evidence from RCTs only

2 (5%)

4 (8%)

Study quality assessed

38 (97%)

42 (93%)