Popov 1989.

Methods	Randomised controlled trial 5‐arm parallel‐group design Trial duration: 2.7 weeks
Participants	48 participants with knee osteoarthritis were randomised Unclear number of participants with knee osteoarthritis reported at baseline Number of females: 38 Mean age: 55 years
Interventions	Experimental interventions Intervention (A): 40 mg triamcinolone, 3 intra‐articular injections, interval 1 week Intervention (B): 50 mg hydrocortisone, 3 intra‐articular injections, interval 1 week Control intervention Saline solution (no dosage stated), 2 intra‐articular injections, interval 1 week
Outcomes	Extracted pain outcome: (A)‐(B): other algofunctional Extracted function outcome: (A)‐(B): other algofunctional Maximum follow‐up: 0.7 weeks
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Method used to generate random sequence of allocation was not reported, so the risk of selection bias was unclear
Allocation concealment (selection bias)	Unclear risk	Method used to conceal the random sequence of allocation was not reported, so the risk of selection bias was unclear
Blinding of participants?	Unclear risk	It was unclear if method used to blind participants was appropriate
Blinding of health care provider(s)	Unclear risk	It was unclear if method used to blind healthcare providers was appropriate
Intention‐to‐treat analysis performed? Pain	Unclear risk	It was unclear whether all participants randomised were also analysed
Intention‐to‐treat analysis performed? Function	Unclear risk	It was unclear whether all participants randomised were also analysed