Table 1 General features of the patients, according to serum troponin I levels at ICU admission

Age (years)

74 ± 13

71 ± 15

76 ± 10

0.017

Male gender, n (%)

61 (50.8)

18 (36.0)

43 (61.4)

0.009

Troponin I (ng/mL)

0.51 (0.33–1.02)

0.26 (0.02–0.38)

1.0 (0.71–1.03)

–

Serum Cr (mg/dL)

1.52 ± 0.40

1.32 ± 0.39

1.66 ± 0.34

< 0.0001

BUN (mg/dL)

30 ± 12

26 ± 12

32 ± 12

0.0035

Potassium (mEq/L)

4.4 ± 0.7

4.0 ± 0.6

4.7 ± 0.7

< 0.0001

pH

7.34 ± 0.07

7.39 ± 0.05

7.31 ± 0.06

< 0.0001

HCO₃⁻ (mEq/L)

20.5 ± 3.6

20.4 ± 3.9

20.6 ± 3.3

0.74

Lactate (mmol/L)

2.8 ± 1.6

2.4 ± 1.4

2.5 ± 1.2

0.75

CRP (mg/dL)

7.7 (6.3–10.5)

8.1 (4.2–16.1)

7.0 (6.3–10.5)

0.24

BNP (pg/mL)

63 (36–134)

62 (37–128)

63 (35–145)

0.45

Urine output (mL/24 h)^a

1461 ± 652

1406 ± 631

1490 ± 682

0.44

Fluid balance (mL/24 h)^a

+ 1512 ± 428

+ 1539 ± 483

+ 1493 ± 387

0.56

 Stage 0, n (%)

4 (3.3)

4 (8.0)

0 (0.0)

0.028

 Stage 1, n (%)

59 (49.2)

32 (64.0)

27 (38.6)

0.009

 Stage 2, n (%)

57 (47.5)

14 (28.0)

43 (61.4)

0.0004

 Stage 3, n (%)

0 (0.0)

0 (0.0)

0 (0.0)

–