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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