DOS 2017

DOS Kongressen 2017 ·

Risk factors of infection after shoulder arthroplasty.

Incidence, infection-free survival and relative risks in

6877 primary shoulder replacements

Sahar Moeini, Jeppe V. Rasmussen, Stig Brorson

Orthopedic department, Herlev Hospital; Orthopedic department

Background:

Deep infection after arthroplasty is associated with extensive

consequences for patients and health care providers. Nonetheless, scientific

data on incidence and risk factors for deep infection after shoulder arthroplasty

is limited. Most studies report revision rates in general without focusing on in-

fection.

Purpose / Aim of Study:

The purpose of this study was to report the in-

cidence of revision due to infection in primary shoulder arthroplasties and to

identify risk factors associated with infection. Thus, the aim was to provide the

surgeon with data in clinical decision- making and when informing the patient.

Materials and Methods:

We included all primary arthroplasties reported to

the Danish Shoulder Arthroplasty Registry (DSR) between 2006 and 2013 –

comprising 6877 arthroplasties in 6555 patients. Incidence of infection was

reported. We reported infection-free survival with Kaplan Meier and relative

risks (RR) with Cox regression according to different risk factors. The risk fac-

tors included age, gender, diagnosis, primary arthroplasty design and previous

surgery on the same shoulder.

Findings / Results:

55 (0.8%) were revised due to infection. The overall in-

fection-free survival was 98.5 % (standard error = 0.3). Male patients, rotator

cuff arthropathy, reverse arthroplasty and previous surgery showed the lowest

survival estimates. The adjusted RR for infection was significant higher for male

gender, previous surgery and reverse arthroplasty.

Conclusions:

The incidence of infection was low. We found an increased RR for

reverse arthroplasty, male gender and previous surgery.

No conflicts of interest reported

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