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Does Arthroscopic Acromioplasty Provide Any Additional Value in the Treatment of Shoulder Impingement Syndrome?: a Two-Year Randomised Controlled Trial.

Ketola, Rousi·J Bone Joint Surg Br·2009·181 citations·Shoulder & Elbow
Free Full Text·DOI·PubMed
SummaryAbstract on PubMed →

This randomised controlled trial tested whether arthroscopic acromioplasty adds value beyond supervised exercise for stage II shoulder impingement syndrome. 140 patients who had already failed conservative treatment were randomised to exercise alone or surgery plus the same exercise programme. The primary outcome was self-reported VAS pain at 24 months.

Study Snapshot

Design
Randomised controlled trial
Blinding: Single-blind
Setting: Two hospitals, Finland
Funding: None
Objective
Whether arthroscopic acromioplasty adds value over supervised exercise alone in stage II shoulder impingement
Outcome(s)
Self-reported VAS pain (0 to 10) at 24 months
Subjects
140 patients
  • 70Exercise
  • 70Combined
Inclusion
  • Positive Neer's test
  • Failed conservative treatment, symptoms >3 months
  • Age 18 to 60 years
Exclusion
  • Glenohumeral or AC osteoarthritis, instability
  • Full-thickness rotator cuff tear
  • Adhesive capsulitis or cervical radiculopathy
Follow-up
24 months (assessments at 3, 6, 12, 24)
Statistics
Independent samples t-testPaired t-testChi-squared testBootstrapping

Key Findings

  • At 24 months there was no statistically significant difference in VAS pain between adding surgery and exercise alone (p = 0.65). Both groups improved well beyond the minimal clinically important difference, so acromioplasty added nothing durable.
  • Both arms improved substantially from baseline: exercise dropped from 6.5 to 2.9 and combined from 6.4 to 2.5 on VAS (p < 0.001 within each group). Structured exercise alone produced a clinically meaningful pain reduction.
  • Pain-free patients (VAS ≤ 3) at 24 months were 64% with exercise vs 65% with surgery (p = 0.90). The endpoints were essentially identical regardless of operation.
  • The surgical arm cost far more: mean €2961 vs €1864, giving an incremental cost-effectiveness ratio of €5431 per MCID unit. The added expense bought no reliable clinical gain.
  • The combined group recovered faster early on, with better pain scores at 3, 6 and 12 months counted from intervention. That early edge vanished by 24 months as the exercise group caught up along the natural course.
  • Occult labral lesions missed on non-contrast MRI were found at arthroscopy in 14 of 70 surgical patients, and were the main pain source in 5. This highlights the diagnostic limits of MRI without contrast in the impingement workup.
  • Crossover reflected real practice: 14 exercise patients eventually had surgery while 12 surgical patients declined operation. The intention-to-treat design preserved the comparison despite this.
Board PearlFor stage II shoulder impingement, adding arthroscopic acromioplasty to supervised exercise gives no clinically important benefit at 2 years and costs far more.

Clinical Relevance

When a patient with stage II impingement has failed rest, NSAIDs, subacromial injections, and physiotherapy, the reflex is to offer acromioplasty. This trial argues against that reflex.

Crucially, these were the very patients you would consider surgical candidates: mean symptom duration 2.5 years, and 59% had already had steroid injections. Even in this failed-conservative group, adding surgery produced no clinically important benefit over a structured, supervised exercise programme at two years.

The mental model: most recovery comes from the natural course plus dedicated exercise, not from removing bone. Surgery sped early recovery but the exercise group caught up by 24 months.

Apply this by treating supervised exercise as the foundation, and reserving acromioplasty for clear indications, which the authors state have not yet been established. The surgical arm cost about 60% more with no reliable outcome advantage.

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|

Does Arthroscopic Acromioplasty Provide Any Additional Value in the Treatment of Shoulder Impingement Syndrome?: a Two-Year Randomised Controlled Trial.

Ketola, Rousi·J Bone Joint Surg Br·2009·181 citations·Shoulder & Elbow
Free Full Text·DOI·PubMed
SummaryAbstract on PubMed →

This randomised controlled trial tested whether arthroscopic acromioplasty adds value beyond supervised exercise for stage II shoulder impingement syndrome. 140 patients who had already failed conservative treatment were randomised to exercise alone or surgery plus the same exercise programme. The primary outcome was self-reported VAS pain at 24 months.

Study Snapshot

Design
Randomised controlled trial
Blinding: Single-blind
Setting: Two hospitals, Finland
Funding: None
Objective
Whether arthroscopic acromioplasty adds value over supervised exercise alone in stage II shoulder impingement
Outcome(s)
Self-reported VAS pain (0 to 10) at 24 months
Subjects
140 patients
  • 70Exercise
  • 70Combined
Inclusion
  • Positive Neer's test
  • Failed conservative treatment, symptoms >3 months
  • Age 18 to 60 years
Exclusion
  • Glenohumeral or AC osteoarthritis, instability
  • Full-thickness rotator cuff tear
  • Adhesive capsulitis or cervical radiculopathy
Follow-up
24 months (assessments at 3, 6, 12, 24)
Statistics
Independent samples t-testPaired t-testChi-squared testBootstrapping

Key Findings

  • At 24 months there was no statistically significant difference in VAS pain between adding surgery and exercise alone (p = 0.65). Both groups improved well beyond the minimal clinically important difference, so acromioplasty added nothing durable.
  • Both arms improved substantially from baseline: exercise dropped from 6.5 to 2.9 and combined from 6.4 to 2.5 on VAS (p < 0.001 within each group). Structured exercise alone produced a clinically meaningful pain reduction.
  • Pain-free patients (VAS ≤ 3) at 24 months were 64% with exercise vs 65% with surgery (p = 0.90). The endpoints were essentially identical regardless of operation.
  • The surgical arm cost far more: mean €2961 vs €1864, giving an incremental cost-effectiveness ratio of €5431 per MCID unit. The added expense bought no reliable clinical gain.
  • The combined group recovered faster early on, with better pain scores at 3, 6 and 12 months counted from intervention. That early edge vanished by 24 months as the exercise group caught up along the natural course.
  • Occult labral lesions missed on non-contrast MRI were found at arthroscopy in 14 of 70 surgical patients, and were the main pain source in 5. This highlights the diagnostic limits of MRI without contrast in the impingement workup.
  • Crossover reflected real practice: 14 exercise patients eventually had surgery while 12 surgical patients declined operation. The intention-to-treat design preserved the comparison despite this.
Board PearlFor stage II shoulder impingement, adding arthroscopic acromioplasty to supervised exercise gives no clinically important benefit at 2 years and costs far more.

Clinical Relevance

When a patient with stage II impingement has failed rest, NSAIDs, subacromial injections, and physiotherapy, the reflex is to offer acromioplasty. This trial argues against that reflex.

Crucially, these were the very patients you would consider surgical candidates: mean symptom duration 2.5 years, and 59% had already had steroid injections. Even in this failed-conservative group, adding surgery produced no clinically important benefit over a structured, supervised exercise programme at two years.

The mental model: most recovery comes from the natural course plus dedicated exercise, not from removing bone. Surgery sped early recovery but the exercise group caught up by 24 months.

Apply this by treating supervised exercise as the foundation, and reserving acromioplasty for clear indications, which the authors state have not yet been established. The surgical arm cost about 60% more with no reliable outcome advantage.

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