Table 1 Patients’ data overview

Group size

13

9

28

13

21

28

Gender: Male / female

7 / 6

6 / 3

17 / 11

11 / 2

14 / 7

20 / 8

Age [years]

49.0 ± 4,7

51.0 ± 4.2

55.2 ± 2.6

42.4 ± 3.8

51.6 ± 2.7

42.3 ± 2.6

Closed / open fracture

11 / 2

7 / 2

24 / 4

10 / 3

14 / 7

18 / 10

Nicotine abuse

6

2

4

1

10

6

Diabetes mellitus

2

0

2

1

4

0

Steroid therapy

0

0

1

0

0

0

Charlson comorbidity index [33]

0.23 ± 0.12

0.33 ± 0.17

0.41 ± 0.15

0.31 ± 0.17

0.38 ± 0.16

0.14 ± 0.08

Period of time between index operation and revision surgery [months]