Table 1 Preoperative risk scores, predicting the failure of a DAIR procedure in the case of an unknown microorganism

K

Chronic renal failure (kidney)

2

C

COPD

2

CRP > 150 mg/L

1

L

Liver cirrhosis

1.5

R

Rheumatoid arthritis

3

I

Index surgery (revision surgery or prosthesis indicated for a fracture)

1.5

I

Index surgery (prosthesis indicated for a fracture)

3

C

Cemented prosthesis

2

M

Male gender

1

C-reactive protein > 115 mg/L

2.5

E

Exchange of mobile component

-1

80

Age > 80 years

2

Risk of DAIR failure (%) ^c

Score^c

Risk of DAIR failure (%) ^c

Score ^c

28%

 ≤ 2

22%

‑1

37%

2.5 – 3.5

28%

0

49%

4 – 5

40%

1 – 2

55%

5.5 – 6.5

64%

3 – 4

86%

 ≥ 7

79%

≥ 5