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Comparison of methods of original review. RCT: randomised controlled trial
| 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%) |
