Shoulder arthroplasties have fewer complications than hip or knee arthroplasties in US veterans.
Fehringer EV, Mikuls TR, Michaud KD, Henderson WG, O'Dell JR. Shoulder arthroplasties have fewer complications than hip or knee arthroplasties in US veterans. Clin Orthop Relat Res. 2010 Mar; 468(3):717-22.