First author | Design | Quality rating subscores | Main limitation | |
---|---|---|---|---|
*Pre-post and Pre-post 2 scoring differed in that for Pre-post 2, team or club membership may have been inconsistent over time, thus questions on follow up were not applicable. | ||||
Ekstrand | RCT | Randomisation | 1/2 | Lack of adherence to original |
Double blind | 0/2 | RCT design | ||
Drop outs described | 1/1 | |||
Total | 2/5 | |||
Caraffa | Non-equivalent | Reporting | 5/6 | Comparability of groups |
control group | Internal validity | 5/8 | ||
Total | 10/14 | |||
Percentage | 71% | |||
Elias | Time series | Reporting | 3/6 | Limitations in design and |
(Pre-post) | Internal validity | 5/9 | reporting | |
Total | 8/15 | |||
Percentage | 53% | |||
Lehnhard | Time series | Reporting | 3/5 | Comparability of groups |
(Pre-post 2)* | Internal validity | 4/9 | ||
Total | 7/14 | |||
Percentage | 50% |