The Kaiser Permanente shoulder arthroplasty registry: results from 6,336 primary shoulder arthroplasties.
OBJECTIVE
Shoulder arthroplasty is being performed in the United States with increasing frequency. We describe the medium-term findings from a large integrated healthcare system shoulder arthroplasty registry.


METHODS
Shoulder arthroplasty cases registered between January 2005 and June 2013 were included for analysis. The registry included patient characteristics, surgical information, implant data, attrition, and patient outcomes such as surgical site infections, venous thromboembolism, and revision procedures.


RESULTS
During the study period, 6,336 primary cases were registered. Median follow-up time for all primaries was 3.3 years; 461 cases were lost to follow-up by ending of health plan membership. Primary cases were predominantly female (56%) and white (81%), with an average age of 70 years. The most common reason for surgery was osteoarthritis in 60% of cases, followed by acute fracture (17%) and rotator cuff tear arthropathy (15%). In elective shoulder arthroplasty procedures, 200 all-cause revisions (4%) were reported, with glenoid wear being the most common reason.


CONCLUSIONS
Most arthroplasties were elective procedures: over half performed for osteoarthritis. Glenoid wear was the most common reason for revision of primary shoulder arthroplasty in elective cases.
The Permanente Medical Group , Sacramento.
Mark T
MT
Dillon
Christopher F
CF
Ake
Mary F
MF
Burke
Anshuman
A
Singh
Edward H
EH
Yian
Elizabeth W
EW
Paxton
Ronald A
RA
Navarro
D000368:Aged; D000369:Aged, 80 and over; D001178:Arthroplasty / Q000379:methods / Q000706:statistics & numerical data*; D003695:Delivery of Health Care / Q000706:statistics & numerical data*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000453:epidemiology / Q000601:surgery*; D012042:Registries; D012086:Reoperation / Q000706:statistics & numerical data; D012189:Retrospective Studies; D017006:Rotator Cuff / Q000601:surgery; D000070636:Rotator Cuff Injuries; D012784:Shoulder Fractures / Q000453:epidemiology / Q000601:surgery*; D012785:Shoulder Joint / Q000601:surgery*; D013530:Surgical Wound Infection / Q000453:epidemiology; D016896:Treatment Outcome; D014481:United States / Q000453:epidemiology; D020246:Venous Thrombosis / Q000453:epidemiology