Main analysis | DS1 | DS2 | |
N | 211 | 131 | 115 |
General information on methods | |||
Description of the data collection | |||
Prospective | 174 (82%) | 106 (81%) | 94 (82%) |
Retrospective | 18 (9%) | 13 (10%) | 11 (10%) |
Mixed | 1 (0%) | 1 (1%) | 1 (1%) |
Not mentioned | 18 (9%) | 10 (8%) | 9 (8%) |
Indication of adherence to STROBE reporting guidelines | 10 (5%) | 6 (5%) | 6 (5%) |
Outcomes | |||
More than one effectiveness outcome | 107 (51%) | 78 (60%) | 69 (60%) |
DS1: Dataset 1 includes only studies where the comparison of at least two treatments was the main exposure of interest (head to head studies).
DS2: Dataset 2 includes only studies from DS1, which had no other outcome than effectiveness.
STROBE, STrengthening the Reporting of OBservational studies in Epidemiology.