Table 2 Comparison data between the two groups

Age (years)

78.6 ± 6.6

78.7 ± 6.7

0.898

Gender (male : female)

28:118

24:44

0.016

Body mass index (kg/m²)

22.2 ± 3.0

22.3 ± 3.6

0.470

ASA score

0.117

 II

26

11

 III

105

50

 IV

15

7

Bone mineral density (T-score)

− 2.7 ± 1.0

− 2.6 ± 0.8

0.563

Fracture site (neck : trochanter)

54:92

25:43

1.000

Patients with underlying diseases* (%)

50 (34.2)

27 (39.7)

0.072

Anesthesia (general : spinal)

70:76

34:34

0.883

Operation time (minutes)

84.9 ± 27.0

85.0 ± 32.0

0.973

Amount of intraoperative urine output (cc)

201.0 ± 174.8

202.3 ± 170.7

0.959

Amount of estimated blood loss (mL)

504.8 ± 199.6

561.8 ± 262.5

0.115

Amount of transfusion (units)

2.8 ± 1.9

3.2 ± 2.0

0.250

Time to rehabilitation after surgery

0.854

 POD 2

107

50

 POD 3

33

15

 POD 4

4

2

 ≥ POD 5

2

1

PCA (intravenous : epidural)

137:9

61:7

0.402

Duration of PCA infused (days)

2.2 ± 0.6

2.2 ± 0.7

0.400

Duration of Foley catheter indwelling after surgery (days)

3.7 ± 3.3

2.8 ± 1.2

0.004

Duration of hospitalization (days)

13.8 ± 5.7

14.7 ± 5.5

0.657

Urinary tract infection (%)

5 (3.4%)

6 (8.8%)

0.107