Table 2 Methodological features of included methodological reviews (N = 31)
Variable | n (%) |
|---|---|
Reported study type (nomenclature) in the “Methods” section | 12 (38.7) |
Number of databases searched (mean, SD) | 2 (1.6) |
Number of records included (median, IQR) | 77 (13 – 1127) |
Reported (or referenced) a protocol | 7 (22.6) |
Reported (or referenced) a search strategy | 23 (74.2) |
Justified search time limits | 8 (25.8) |
Performed a sample size calculation a priori | 5 (16.1) |
Randomly sampled included records (of n = 5) | 5 (100) |