Table 2 Baseline characteristics

Age (years), mean (SD)

81.54 (± 6.91)

83.39 (± 6.959)

0.201

Gender (female)

87.8% (n = 36)

68.5% (n = 37)

0.027

ASA score

0.406

 1–2

29.3% (n = 12)

22.2% (n = 12)

 3

68.3% (n = 28)

74.1% (n = 40)

 4–5

2.4% (n = 1)

3.7% (n = 2)

Charlson comorbidity index, mean (SD)

2.51 (± 1.989)

2.09 (± 1.733)

0.281

Length of stay (days), mean (SD)

12.98 (± 4.43)

13.36 (± 5.516)

0.536

Proximal humerus

11.00 (3.661)

10.00 (6.453)

0.656

Femoral

13.70 (4.519)

14.67 (4.817)

0.392

Type of fracture

0.440

 Proximal humerus

26.8% (n = 11)

22.2% (n = 12)

 Femoral

  Trochanteric

29.3% (n = 12)

29.6% (n = 16)

  Femoral neck

41.5% (n = 17)

37.0% (n = 20)

  Periprosthetic

2.4% (n = 1)

11.1% (n = 6)

Type of treatment

0.218

 Femoral

  Osteosynthesis

50.0% (n = 15)

50.0% (n = 21)

  Prosthesis

50.0% (n = 15)

50.0% (n = 21)

 Humeral

  Osteosynthesis

54.5% (n = 6)

91.7% (n = 11)

  Prosthesis

45.5% (n = 5)

8.3% (n = 1)

Time to surgery

 Femoral

0.134

  < 24 h

93.3% (n = 28)

81.0% (n = 34)

  24 h

6.7% (n = 2)

19.0% (n = 8)

 Humeral

0.901

  < 24 h

27.3% (n = 3)

25.0% (n = 3)

  > 24 h

72.7% (n = 8)

75.0% (n = 9)

GFR (ml/min)

66.93 (± 19.865)

69.93 (± 21.474)

0.496

Creatinine (mg/dl)

0.945 (± 0.357)

1.11 (± 0.453)

0.056

Vit. D

0.213

 < 20 ng/ml

69.2%(n = 18)

84.4% (n = 27)

 > 20 ng/ml

30.8%(n = 8)

15.6%(n = 5)

 Not stated

n = 15

n = 22

Discharged to

 Femoral

0.777

  Own home

13.3% (n = 4)

14.3% (n = 6)

  Nursing home

10.0% (n = 3)

4.8% (n = 2)

  Rehabilitation unit

63.3% (n = 19)

71.4% (n = 30)

  Short-term nursing

13.3% (n = 4)

9.5% (n = 4)

 Humeral

0.169

  Own home

72.7% (n = 8)

58.3% (n = 7)

  Nursing home

0% (n = 0)

16.7% (n = 2)

  Rehabilitation unit

9.1% (n = 1)

25.0% (n = 3)

  Short-term nursing

18.2% (n = 2)

0% (n = 0)