Comparison 4. Arthroscopic surgery versus non‐arthroscopic lavage.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
4.1 Pain (AIMS‐P subscale, 0‐10, lower score=less pain)	1		Mean Difference (IV, Random, 95% CI)	Subtotals only
4.1.1 Up to 3 months	1	32	Mean Difference (IV, Random, 95% CI)	‐0.40 [‐1.66, 0.86]
4.1.2 >6 months up to 2 years	1	32	Mean Difference (IV, Random, 95% CI)	0.30 [‐1.15, 1.75]
4.2 Function (AIMS‐PF subscale, 0‐10, higher score=better function)	1		Mean Difference (IV, Random, 95% CI)	Subtotals only
4.2.1 Up to 3 months	1	32	Mean Difference (IV, Random, 95% CI)	0.50 [‐0.25, 1.25]
4.2.2 >6 months up to 2 years	1	32	Mean Difference (IV, Random, 95% CI)	0.30 [‐0.50, 1.10]
4.3 Participant‐reported success (≥1cm improvement in VAS)	1		Risk Ratio (M‐H, Random, 95% CI)	Subtotals only