Study	Reason for exclusion
Adams 2006	Only active control interventions
Andrei 1984	Percentage of participants with knee or hip osteoarthritis 17% (5/30)
Boureau 1990	Only active control interventions
Boyer 2012	Cross‐over trial providing pooled results only
Brooks 1982	Percentage of participants with osteoarthritis 50%, no information about joints involved
Burch 2004	Not a randomised controlled trial
Caldwell 1999	Percentage of participants with knee or hip osteoarthritis likely to be below 50%
Choquette 2008	Not a randomised controlled trial
Conaghan 2011	Only active control interventions
Corsinovi 2009	Only active control interventions
Doak 1992	Cross‐over trial providing pooled results only
Fancourt 1984	Mixed population of rheumatoid arthritis and osteoarthritis, no information about number of participants with osteoarthritis
Friedmann 2011b	Percentage of participants with knee or hip osteoarthritis 15% (123/827)
Gazi 2005	Only active control interventions
Hale 2007	Only active control interventions
James 2010	Only active control interventions
Katz 2010b	Only active control interventions
Le Loet 2005	Not a randomised controlled trial
McIlwain 2005	Not a randomised controlled trial
Mitchell 1984	Mixed population of rheumatoid arthritis and osteoarthritis, no information about number of participants with osteoarthritis
Neubauer 1983	Percentage of participants with osteoarthritis 15% (5/33)
Rosenthal 2007	Not a randomised controlled trial
Roth 2000	Percentage of participants with knee or hip osteoarthritis likely to be below 50%
Salzman 1983	Only active control interventions
Tassain 2003	Percentage of participants with osteoarthritis 7% (2/28)
Torres 2001	Not a randomised controlled trial
Vignon 1999	Comparison of combination of dextropropoxyphene, paracetamol, and caffeine with placebo
Vlok 1987	Cross‐over trial providing pooled results only
Vorsanger 2011	Only active control interventions
Wallace 1994	Cross‐over trial providing pooled results only
Wang 1965	Percentage of participants with osteoarthritis 6% (2/34)
Wild 2010	Only active control interventions