Table 4 Univariate and multivariate Cox regression analyses of factors associated with 1-year follow-up all-cause mortality

Age (per 1 year increase)

1.1 (1.0–1.1)

0.009

1.0 (1.0–1.1)

0.066

Sex (Female vs. Male)

1.1 (0.6–1.8)

0.799

Fracture type (31A1 vs. 31A2)

2.5 (1.1–5.7)

0.036

1.9 (0.8–4.6)

0.132

Fracture side (left vs. right)

0.8 (0.5–1.3)

0.275

Comorbidities

 None

1.0 (Reference)

 1

21,624.4 (0–2.6E + 43)

0.828

 2 or more

55,076.5 (0–6.6E + 43)

0.812

ASA score (1 + 2 vs. 3 + 4)

3.9 (1.0–15.8)

0.060

5.1 (1.1–23.8)

0.040

Type of anesthesia

 General

1.0 (Reference)

 Combine spinal and epidural + spinal

0.70 (0.4–1.2)

0.165

 Nerve block

0.8 (0.2–3.5)

0.815

Preoperative waiting time (per 1 day increase)

1.1 (1.1–1.2)

0.001

1.1 (1.0–1.2)

0.007

Hemoglobin (per 1 g/l increase)

1.0 (1.0–1.0)

0.001

1.0 (1.0–1.0)

0.229

Blood transfusion (no vs. yes)

3.0 (1.7–5.6)

 < 0.001

1.6 (0.8–3.2)

0.153

CRQC grade

 Excellent

1.0 (Reference)

1.0 (Reference)

 Acceptable

3.9 (2.1–3.3)

 < 0.001

3.1 (1.6–5.9)

0.001

 Poor

13.4 (6.4–7.4)

 < 0.001

14.8 (6.8–32.1)

 < 0.001