Raaij van 2010.

Methods	RCT; computer‐generated blocked randomisation
Participants	Medial knee OA: n = 91 Male/female: 46/45 Mean age (years): 55 Mean BMI (kg/m2): 29 Mean varus (degrees) = 187 Degree of medial OA according to Kellgren & Lawrence (n): I = 37, II = 17, III = 35, IV = 2 Degree of lateral OA according to Kellgren & Lawrence (n): 0 = 67, I = 22, II = 2
Interventions	I = 10‐mm laterally full‐length wedged insole (n = 45) vs C = valgus brace (n = 46)
Outcomes	VAS (pain), WOMAC, degree of varus (hip‐knee‐ankle angle)
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Quote: "participants were randomised according to a computer‐generated procedure (block randomisation, with variable sizes of the blocks)"
Allocation concealment (selection bias)	Low risk	Quote: "the randomizations codes were held by an independent observer to ensure masked blocking"
Blinding (performance bias and detection bias) All outcomes	High risk	Unblinded trial
Blinding of participants and personnel (performance bias) All outcomes	High risk	Quote: "completely unblinded"
Blinding of outcome assessment (detection bias) All outcomes	High risk	Quote: "one non‐blinded investigator, a trained orthopedic surgeon, assessed the follow‐up measurements"
Incomplete outcome data (attrition bias) All outcomes	Low risk	Quote: "by intention‐to‐treat"
Selective reporting (reporting bias)	Low risk	Complete data were reported