| Study | Reason for exclusion |
|---|---|
| Baker 2007 | Cross‐over design |
| Birmingham 2001 | No control group |
| Horlick 1993 | Participants are their own controls |
| Hunter 2012 | Cross‐over design |
| Katsuragawa 1999 | No control group |
| Kuroyanagi 2007 | Cross‐over design |
| Matsuno 1997 | No control group |
| Rooser 1988 | Rheumatoid arthritis after total knee arthroplasty Healthy controls |
| Sasaki 1987 | Retrospective trial |
| Shakoor 2008 | Cross‐over design |
| Toda 2002b | Correlation study |
| Tohyama 1991 | Retrospective study |
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