Table 1 Data of 214 patients over 70 years old with hip fractures

Age (years)

78.7 (70–99)

Gender (men : women)

52:162

Body mass index (kg/m²)

22.3 (13–33)

Bone mineral density (T-score)

− 2.6 (− 5.3 to − 0.3)

ASA score

2.9 (2–4)

 II

37

 III

155

 IV

22

Number of underlying disease*

0.7 (0–2)

Anesthesia (general : spinal)

104:110

Operation time (minutes)

85.0 (35–170)

Amount of intraoperative fluid infused (mL)

1181.8 (130–2450)

Amount of estimated blood loss (mL)

522.9 (50–1200)

 POD 2

157

 POD 3

48

 POD 4

6

 ≥ POD 5

3

PCA (intravenous : epidural)

198:16

Duration of PCA infused (days)

2.2 (1–5)

Duration of Foley catheter indwelling (days)

3.4 (0–7)

Duration of hospitalization (days)

24.1 (9–105)