Characteristic | Studies |
---|---|
N = 132 | |
n (%) | |
Journal of publication | |
 Specialty | 119 (90) |
 General | 33 (10) |
Country | |
 Europe | 44 (33) |
 North America | 32 (24) |
 Middle/South America | 1 (1) |
 Australia | 7 (5) |
 Asia | 48 (37) |
 Africa | 0 (0) |
Type of intervention | |
 Pharmacological | 51 (39) |
 Non-pharmacological | 81 (61) |
 Primary studies included (median [IQR]) | 14 [9.0–26.0] |
 Randomised controlled trials included (median [IQR]) | 5.0 [2.0–8.0] |
 OSs included (median [IQR]) | 9. 0 [5.0–18.0] |
Specific OS designs included | |
 Prospective cohort studies | 17 (13) |
 Retrospective cohort studies | 13 (10) |
 Case control studies | 9 (7) |
Were the different types of OSs analysed differently? | |
 Yes | 8 (6) |
 No | 120 (91) |
 Unclear | 4 (3) |
Was an evaluation of the risk of bias for primary studies provided? | |
 yes, with different tools for OSs and RCTs | 79 (65) |
 yes, with same tool for OSs and RCTs | 33 (27) |
 yes, for OSs only | 8 (6) |
 yes, for RCTs only | 1 (1) |
 No | 11 (8) |