Table 3 Univariate and multivariate Cox regression analyses of factors associated with total follow-up all-cause mortality

Age (per 1 year increase)

1.1 (1.0–1.1)

 < 0.001

1.0 (1.0–1.1)

0.006

Sex (Female vs. Male)

1.3 (0.8–1.9)

0.285

Fracture type (31A1 vs. 31A2)

1.9 (1.1–3.1)

0.033

1.6 (0.9–2.9)

0.102

Fracture side (left vs. right)

0.8 (0.6–1.2)

0.342

Comorbidities

 None

1.0 (Reference)

1.0 (Reference)

 1

8.1 (1.9–34.0)

0.004

6.6 (1.6–28.2)

0.010

 2 or more

16.9 (4.1–68.9)

 < 0.001

8.65 (2.1–36.4)

0.003

ASA score (1 + 2 vs. 3 + 4)

6.8 (1.7–27.5)

0.007

5.1 (1.1–22.7)

0.033

Type of anesthesia

 General

1.0 (Reference)

 Combine spinal and epidural + spinal

0.8 (0.5–1.2)

0.192

 Nerve block

0.7 (0.2–3.1)

0.681

Preoperative waiting time (per 1 day increase)

1.1 (1.1–1.2)

 < 0.001

1.1 (1.0–1.2)

0.005

Hemoglobin (per 1 g/l increase)

1.0 (1.0–1.0)

0.010

1.0 (1.0–1.0)

0.907

Blood transfusion (no vs. yes)

2.2 (1.4–3.4)

0.001

1.7 (1.0–2.9)

0.052

CRQC grade

 Excellent

1.0 (Reference)

1.0 (Reference)

 Acceptable

2.2 (1.4–3.3)

0.01

1.6 (1.0–2.5)

0.043

 Poor

5.9 (3.2–10.9)

 < 0.001

6.7 (3.5–12.8)

 < 0.001