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Table 1 Patients baseline characteristics

From: Preoperative anemia increases mortality and postoperative morbidity after cardiac surgery

 

Preoperative anemia (n = 1,856)

Control group (n = 5,882)

P

Age (years ± SD)

69 ± 10.6

64.5 ± 11.6

<0.0001

Hemoglobin level (g/dl ± SD)

11.5 ± 1.1

14.3 ± 1.1

<0.0001

Female, n (%)

517 (27.9)

1419 (24.1)

<0.001

NYHA III-IV class, n (%)

809 (43.6)

1826 (31)

<0.0001

Diabetes, n (%)

424 (22.8)

703 (12)

<0.0001

Diabetes, n (%)

424 (22.8)

703 (12)

<0.0001

Hypertension, n (%)

1306 (70.4)

3910 (66.5)

0.002

Chronic Pulmonary disease, n (%)

293 (15.8)

661 (11.2)

<0.0001

Renal failure, n (%)

85 (4.6)

42 (0.7)

<0.0001

Extracardiac arteriophaty, n (%)

222 (12)

429 (7.3)

<0.0001

Previous cardiac operations, n (%)

128 (6.9)

330 (5.6)

0.046

Preoperative EF (%), n (%)

  

<0.0001

  Good

1296 (69.8)

4579 (77.8)

 

  Fair

439 (23.7)

1114 (18.9)

 

  Poor

121 (6.5)

189 (3.2)

 

Recent MI, n (%)

479 (25.8)

987 (16.8)

<0.0001

Emergency, n (%)

78 (4.2)

90 (1.5)

<0.0001

Cardiac procedures

  

<0.0001

CABG, n (%)

1075 (57.9)

3775 (64.2)

 

Single valve surgery (n, %)

319 (17.2)

935 (15.9)

 

Combined procedures (n, %)

372 (20)

655 (11.1)

 

Aortic surgery, n (%)

90 (4.8)

217 (3.7)

 
  1. NYHA: New York Heart Association, EF: Ejection fraction; MI: myocardial infarction; CABG: coronary artery bypass grafting.