Table 2 Cox proportional hazards regression results for 5-year mortality

Delirium

1.501

0.272

0.025

1.053

2.140

Age

1.018

0.007

0.009

1.005

1.032

Sex

0.766

0.140

0.146

0.535

1.097

Operative time

1.002

0.001

0.023

1.000

1.003

Atrial fibrillation

0.859

0.174

0.453

0.578

1.278

Diabetes mellitus

1.574

0.366

0.051

0.998

2.482

Hypertension

2.048

0.475

0.002

1.300

3.225

Emergency surgery

3.380

0.717

 < 0.001

2.231

5.122

Creatinine

1.190

0.052

 < 0.001

1.093

1.295

Cerebral infarction

1.258

0.254

0.255

0.847

1.869

Valvular disease

0.443

0.131

0.006

0.248

0.790

Aortic disease

0.339

0.105

 < 0.001

0.185

0.621

Adult congenital heart disease

1.032

0.606

0.958

0.326

3.264

Redo surgery

0.554

0.196

0.095

0.278

1.108

Pulmonary thromboendarterectomy

0.734

0.560

0.685

0.165

3.271

Isolated CABG

0.789

0.313

0.549

0.363

1.715

Total transfusion volume

1.035

0.008

 < 0.001

1.020

1.050