Article TextOriginal researchSubacromial decompression versus diagnostic arthroscopy for shoulder impingement: a 5-year follow-up of a randomised, placebo surgery controlled clinical trialObjectives To assess the long-term efficacy of arthroscopic subacromial decompression (ASD) by comparing it with diagnostic arthroscopy (primary comparison), a placebo surgical intervention, and with a non-operative alternative, exercise therapy (secondary comparison).Methods We conducted a multicentre, three group, randomised, controlled superiority trial. We included 210 patients aged 35–65 years, who...…Article TextOriginal researchSubacromial decompression versus diagnostic arthroscopy for shoulder impingement: a 5-year follow-up of a randomised, placebo surgery controlled clinical trialObjectives To assess the long-term efficacy of arthroscopic subacromial decompression (ASD) by comparing it with diagnostic arthroscopy (primary comparison), a placebo surgical intervention, and with a non-operative alternative, exercise therapy (secondary comparison).Methods We conducted a multicentre, three group, randomised, controlled superiority trial. We included 210 patients aged 35–65 years, who...WW…