Table 2 Cox proportional hazards model

Age (year)

0.014

0.405

0.525

1.015

0.970–1.061

Sex (female)

− 0.132

0.628

0.428

0.876

0.632–1.214

Body mass index kg/m²

− 0.020

0.560

0.454

0.981

0.932–1.032

Congestive heart failure

0.374

4.213

0.040

1.454

1.017–2.078

0.591

9.852

0.002

1.806

1.249–2.613

Cardiovascular disease

0.381

3.860

0.049

1.464

1.001–2.140

0.467

5.406

0.020

1.594

1.076–2.363

Peripheral vascular disease

0.795

4.136

0.042

2.214

1.029–4.762

0.706

2.911

0.005

2.026

0.900–4.558

Chronic obstructive pulmonary disease

0.878

6.334

0.012

2.406

1.214–4.767

0.895

5.909

0.014

2.474

1.200–5.099

Diabetes mellitus

0.281

0.997

0.318

1.325

0.763–2.299

Diabetes mellitus with end-organ damage

− 0.179

3.636

0.057

0.836

0.696–1.005

Cerebral infarction

0.217

1.368

0.242

1.243

0.863–1.789

Dementia

0.577

10.748

0.001

1.781

1.261–2.514

Collagen disease

0.859

3.538

0.060

2.360

0.965–5.775

Peptic ulcer

0.401

0.314

0.576

1.493

0.367–6.065

Hemiplegia

0.378

12.052

0.001

1.460

1.179–1.808

0.724

10.887

0.001

2.062

1.324–3.213

Mild liver dysfunction

0.137

0.090

0.764

1.147

0.468–2.809

Moderate/severe liver dysfunction

0.068

0.159

0.690

1.070

0.768–1.491

Malignant tumor (no metastasis)

0.605

20.945

0.000

1.831

1.413–2.372

0.691

21.702

0.000

1.995

1.492–2.668

Metastatic malignant tumor

2.000

7.555

0.006

4.331

1.450–12.30

2.090

7.555

0.006

4.668

1.556–14.00

Serum albumin g/dl

− 0.571

18.430

0.000

0.565

0.436–0.733

− 0.453

9.793

0.002

0.634

0.477–0.843

Hemoglobin g/dl

0.021

0.132

0.716

1.021

0.913–1.143

Serum sodium mEq/l

− 0.007

0.193

0.661

0.993

0.961–1.025

Serum potassium mEq/l

0.068

0.801

0.371

1.070

0.923–1.241

eGFR ml/min/1.73 m²

0.059

8.363

0.004

1.061

1.019–1.104

Serum chloride mEq/l

− 0.024

4.148

0.042

0.977

0.955–0.999

Corrected serum calcium mg/dl

0.387

12.290

0.000

1.473

1.186–1.829

Blood urea nitrogen mg/dl

0.005

4.906

0.027

1.005

1.001–1.010

Serum phosphorus mg/dl

0.089

2.477

0.115

1.093

0.978–1.221

Total cholesterol mg/dl

− 0.003

2.783

0.095

0.997

0.994–1.001

C-reactive protein mg/dl

0.060

29.335

0.000

1.062

1.039–1.085

Emergency initiation

0.267

7.078

0.008

1.306

1.073–1.591

Initiation by catheter

0.530

10.176

0.001

1.698

1.227–2.352

Karnofsky Performance Status

− 0.023

38.373

0.000

0.977

0.970–0.984

− 0.018

21.822

0.000

0.981

0.973–0.989

Fracture within 12 months

0.790

9.639

0.002

2.203

1.338–3.628

0.617

6.440

0.011

1.853

1.111–3.089