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Table 2 Modular knee-arthrodesis (MKA) versus Above-the-knee amputation (AKA) after prosthetic joint infection (PJI): clinical course, complications, functional outcome and quality of life

From: Knee arthrodesis versus above-the-knee amputation after septic failure of revision total knee arthroplasty: comparison of functional outcome and complication rates

Characteristic MKA after PJI p-value AKA after PJI
Patients with min. Follow-up (12 month), n (%) 55 (67.9)   20 (62.5)
Follow-up interval in month    
 • Mean (sd) 53 (26)   62 (40)
 • Min-Max 12–119   12–112
Complications
 Patients with major complication, n (%) 20 (36.4) 0.91 7 (35.0)
 Recurrence of infection, n (%) 12 (21.8) 0.25 7 (35.0)
 (Re-) Amputation, n (%) 6 (10.9) 0.31 4 (20.0)
 MKA Loosening, n (%) 8 (14.5) n/a
 MKA Implant failure, n (%) 1 (1.8) n/a
 Peri-implant fracture, n (%) 4 (7.3) n/a
Patients with functional follow up, n (%) 48 (59.3%)   10 (31.3%)
Functional follow-up examination
 LEFSa, mean (sd) 28 (13.7) 0.181 37 (26.4)
 Physical SF-12, mean (PCS) (sd) 30 (9.1) 0.080 36 (14.5)
 Mental SF-12, mean (MCS) (sd) 46 (11.2) 0.755 47 (12.0)
  1. aLEFS = Lower Extremity Functional Scale. A maximum score of 80 equates to the best functional outcome