• Juha Paloneva, Vesa Lepola, Jaro Karppinen, Jari Ylinen, Ville Äärimaa, and Ville M Mattila.
• Department of Surgery, Central Finland Hospital, Keskussairaalantie 19 , 40620 Jyväskylä , Finland.
• Acta Orthop. 2015 Apr 1; 86 (2): 220-4.

Background And PurposeAn increased incidence rate of acromioplasty has been reported; we analyzed data from the Finnish National Hospital Discharge Register.Patients And MethodsDuring the 14-year study period (1998-2011), 68,877 acromioplasties without rotator cuff repair were performed on subjects aged 18 years or older.ResultsThe incidence of acromioplasty increased by 117% from 75 to 163 per 10(5) person years between 1998 and 2007. The highest incidence was observed in 2007, after which the incidence rate decreased by 20% to 131 per 10(5) person years in 2011. The incidence declined even more at non-profit public hospitals from 2007 to 2011. In contrast, it continued to rise at profit-based private orthopedic clinics.InterpretationWe propose that this change in clinical practice is due to accumulating high-quality scientific evidence that shows no difference in outcome between acromioplasty and non-surgical interventions for rotator cuff disease with subacromial impingement syndrome. However, the exact cause of the declining incidence cannot be defined based solely on a registry study. Interestingly, this change was not observed at private clinics, where the number of operations increased steadily from 2007 to 2011.

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