title: Revision rates and cumulative financial burden in patients treated with hemiarthroplasty compared to cannulated screws after femoral neck fractures.
abstract: BACKGROUND
  This study compares re-operation rates and financial burden following the treatment of femoral neck fractures treated with hemiarthroplasty compared to non-displaced femoral neck fractures treated with cannulated screws.
  
  
  METHODS
  Data was retrospectively analyzed from a prospective database at a university hospital setting on patients undergoing hemiarthroplasty after femoral neck fractures and those with non-displaced femoral neck fractures treated with cannulated screws over a 7-year period. Re-operation rates were determined and financial data was analyzed. Charges refer to amounts billed by the hospital to insurance carriers, while costs refer to financial burden carried by the hospital during treatment.
  
  
  RESULTS
  There were 491 femoral neck fractures (475 patients) that underwent hemiarthroplasty (HA) and 120 non-displaced fractures (119 patients) treated with cannulated screw (CannS) fixation. Both groups had similar age, sex, Charlson co-morbidity scores, pre-operative Parker mobility scores, and 12-month mortality. There were 29 (5.9 %) reoperations in the HA group and 16 (13.3 %) in the CannS group (P = 0.007). The majority of re-operations occurred within 12 months for both groups [21/29 (72 %) HA group; 15/16 (94 %) CannS group; P = 0.13]. Average hospital charges per patient for the index procedure were higher in the HA group ($17,880 ± 745) compared to the CannS group ($14,104 ± 5,047; P < 0.001). After accounting for additional procedures related to their initial surgical fixation, average hospital charges and costs remained higher in the HA group.
  
  
  CONCLUSIONS
  Patients treated with hemiarthroplasty for femoral neck fractures have lower re-operation rates than patients treated with cannulated screws for non-displaced femoral neck fractures, with 80 % of re-operations occurring in the first 12 months. Hospital charges and costs to the hospital for treating patients undergoing hemiarthroplasty were higher than patients treated with cannulated screws for the index procedure alone, and after accounting for re-operations.
authors.affiliation: University of Rochester Medical Center, 601 Elmwood, Box #665, Rochester, NY, 14620, USA, Edward_Shields@urmc.rochester.edu.
authors.forename: Edward
authors.initials: E
authors.lastname: Shields
authors.forename: Stephen L
authors.initials: SL
authors.lastname: Kates
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001863:Bone Screws; D017281:Cost of Illness; D004867:Equipment Design; D005260:Female; D005265:Femoral Neck Fractures / Q000191:economics / Q000601:surgery*; D005593:Fracture Fixation, Internal / Q000191:economics* / Q000706:statistics & numerical data; D062785:Hemiarthroplasty / Q000191:economics* / Q000706:statistics & numerical data; D017722:Hospital Charges; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012086:Reoperation; D012189:Retrospective Studies; D016896:Treatment Outcome