Table 6 The comparison of disease severity, data at initial admission and clinical outcome in 67 patients received selenium administration with and without ICU survival.

Disease severity

APACHE II

22.0 ± 8.6

21.3 ± 8.8

26.4 ± 6.0

0.057

SOFA

7.6 ± 4.0

7.1 ± 3.9

10.7 ± 3.4

0.007

TISS

28.8 ± 7.8

28.1 ± 7.9

33.6 ± 5.3

0.020

Glasgow coma scale

8.9 ± 4.4

9.0 ± 4.5

7.9 ± 3.6

0.492

P/F ratio < 300

25(37.3%)

17(29.3%)

8(88.9%)

0.001

Mechanical ventilation (%)

45(67.2%)

37 (63.8%)

8(88.9%)

0.252

Cause of ICU admission

Sepsis

40(59.7%)

31(53.4%)

9(100%)

0.009

Septic shock

29(43.3%)

20(69%)

9(100%)

< 0.001

Gastrointestinal bleeding

7(10.4%)

7(12.1%)

0(0%)

0.581

Pneumonia

32 (47.8%)

27(46.6%)

5(55.6%)

0.727

Vital signs at ICU admission

Temperature

36.3 ± 0.7

36.3 ± 0.7

36.4 ± 0.5

0.879

Mean arterial pressure

87.6 ± 20.0

87.5 ± 19.3

87.9 ± 25.0

0.711

Heart rate

91.1 ± 23.2

91.3 ± 22.8

90.2 ± 26.8

0.909

Respiratory rate

17.0 ± 6.3

16.3 ± 5.5

21.3 ± 9.5

0.102

Laboratory data

25(OH)D

19.2 ± 8.6

19.2 ± 9.0

19.3 ± 4.8

0.806

Blood urea nitrogen

38.0 ± 25.6

37.8 ± 27.2

39.1 ± 13.3

0.356

Creatinine

1.7 ± 1.6

1.8 ± 1.8

1.5 ± 0.8

0.899

Lactate

2.5 ± 1.6

2.5 ± 1.7

2.3 ± 0.8

0.801

Albumin

2.7 ± 0.5

2.8 ± 0.5

2.4 ± 0.5

0.139

CRP

107.6 ± 100.3

108.4 ± 102.6

103.2 ± 91.8

0.862

PH

7.41 ± 0.07

7.42 ± 0.06

7.37 ± 0.11

0.300

PCO₂

33.3 ± 10.0

32.5 ± 7.4

38.9 ± 20.5

0.149

PaO₂

112.0 ± 56.4

111.2 ± 42.8

116.6 ± 110.1

0.130

P/F ratio

371.9 ± 209.1

401.9 ± 204.7

198.4 ± 145.6

0.001

FiO₂

36.9 ± 17.4

33.0 ± 13.0

58.3 ± 23.5

< 0.001

White blood cells

13.6 ± 8.4

12.3 ± 7.0

22.0 ± 12.5

0.024

Hemoglobin

10.1 ± 2.2

10.1 ± 2.3

10.2 ± 0.9

0.526