Table 1 Population characteristics

 Number

69 (100)

32 (46)

37 (54)

 Gender, female

54 (78)

26 (81)

28 (76)

0.58

 Age, years

89.0 (+/−5.17) / 90.0 [86.0–92.0]

89.1 (+/−5.18)

88.9 (+/−5.22)

0.87

  Femoral neck

39 (57)

16 (50)

23 (62)

0.63

  Pertrochanteric

26 (38)

14 (44)

12 (32)

–

  Peri-prosthetic

4 (5.8)

2 (6.2)

2 (5.4)

–

  Preoperative delay, hours

80.4 (+/−50.6) / 72.0 [48.0–96.0]

78.0 (+/− 51.1)

82.3 (+/− 50.9)

0.72

  Total hip prosthesis

9 (13)

2 (6.2)

7 (19)

0.46

  Intermediate hip prosthesis

30 (43)

15 (47)

15 (41)

–

  Gamma nail osteosynthesis

27 (39)

14 (44)

13 (35)

–

  Plate Osteosynthesis

3 (4.3)

1 (3.1)

2 (5.4)

–

 Length of stay, days

15.5 (+/−6.13) / 14.0 [12.0–18.0]

14.8 (+/−5.99)

16.1 (+/−6.25)

0.36

  ADL (/6)

3.91 (+/−1.77) / 4.00 [2.75–5.50]

2.89 (+/−1.44)

4.74 (+/−1.58)

< 0.001

  IADL (/8)

2.26 (+/− 2.80) / 1.00 [0–5.00]

0.48 (0.83)

3.65 (+/− 3.01)

< 0.001

  Walking ability with or without technical assistance

53 (82)

21 (72)

32 (89)

0.089

  Community facility

39 (57)

10 (31)

29 (78)

< 0.001

  Nursing home

30 (43)

22 (69)

8 (22)

–

 Moderate or severe cognitive deficits

32 (46)

100 (100)

0 (0)

 Weight, kilograms

57.5 (+/−14.2) / 55.0 [47.0–66.0]

57.2 (+/−11.8)

57.7 (+/− 16.0)

0.89

 Severe renal failure (GFR Cockcroft < 30 ml/min)

11 (16)

3 (9.4)

8 (22)

0.17

  CIRS-G^a (/56)

10.0 (+/−2.93) / 10.0 [8.00–12.00]

10.1 (+/−2.60)

9.96 (+/−3.24)

0.89

  ASA (/6)

2.86 (+/−0.661) / 3.00 [2.25–3.00]

3.00 (+/−0.620)

2.74 (+/−0.682)

0.16

  Charlson^a (/24)

3.40 (+/−2.39) / 3.00 [2.00–4.00]

3.54 (+/−1.89)

3.29 (+/−2.79)

0.38