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Arthroscopic subacromial decompression (ASD) was shown to provide no benefit over diagnostic arthroscopy at 24 months in patients with shoulder impingement, according to a study published in The BMJ. 

Researchers for the Finnish Subacromial Impingement Arthroscopy Controlled Trial (FIMPACT) enrolled 210 patients with symptoms consistent with shoulder impingement, and randomly assigned them to either arthroscopic subacromial decompression ASD, diagnostic arthroscopy (placebo control), or exercise therapy. Primary outcomes measures were shoulder pain at rest and on arm activity at 24 months. In the primary intent-to-treat analysis (ASD compared to diagnostic arthroscopy), the researchers found no clinically relevant between-group differences in the two primary outcomes. Learn more... or Read the article...