Comparison 6. Arthroscopic surgery versus hyaluronic acid injections.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
6.1 Pain (KSSS pain score of 30 or higher; higher=less pain)	1		Risk Ratio (M‐H, Random, 95% CI)	Subtotals only
6.1.1 Up to 3 months	1	120	Risk Ratio (M‐H, Random, 95% CI)	0.81 [0.67, 0.98]
6.1.2 >3 months up to 6 months	1	118	Risk Ratio (M‐H, Random, 95% CI)	0.78 [0.65, 0.92]
6.1.3 >6 months up to 2 years	1	120	Risk Ratio (M‐H, Random, 95% CI)	0.74 [0.63, 0.86]