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Table 1 Patient characteristics and outcome for normal- and low-muscle area patient group

From: Low skeletal muscle area is a risk factor for mortality in mechanically ventilated critically ill patients

 

Normal muscle-area patients n = 88

Low muscle-area patients n = 152

All patients N = 240

Fisher exact test or student t-test, -value

Mean

SD

Mean

SD

Mean

SD

 

Female gender, %

40

 

39

 

39

 

0.892

Age, y

52.3

19.0

63.6

15.7

59.5

17.8

<0.001

APACHE II score

21.7

8.6

24.4

7.7

23.4

8.1

0.013

Weight, kg

80.2

15.6

73.6

15.1

76.0

15.6

0.001

Height, cm

174.4

9.7

173.0

9.5

173.5

9.5

0.281

BMI, kg/m2

26.3

4.3

24.4

4.1

25.1

4.2

0.001

Muscle mass, kg

22.0

4.2

16.6

3.6

18.6

4.6

<0.001

Muscle index, cm2/m2

54.5

8.7

39.4

8.3

45.0

4.6

<0.001

Muscle area, cm2

167.1

35.8

119.1

30.2

136.7

39.8

<0.001

Admission diagnosis, %

       

 Cardiovascular

5.7

 

14.5

 

11.2

 

0.009

 Metabolic/Renal

3.4

 

1.3

 

2.1

(χ 2 test)

 Neurologic

5.7

 

3.9

 

4.6

 Postresuscitation

3.4

 

2.0

 

2.5

 Postsurgery

26.1

 

34.2

 

31.2

 Respiratory insufficiency

9.1

 

15.8

 

13.3

 Sepsis

4.5

 

7.2

 

6.2

 Trauma

35.2

 

14.5

 

22.1

 Others

6.8

 

6.6

 

6.7

Length of ventilation, d (median; IQR)

15

8-28

13

8-23

14

8-25

0.387

ICU length of stay, d (median; IQR)

17

9-30

16

10-28

16

9-28

0.768

Hospital length of stay, d (median; IQR)

42

20-64

41

24-66

41

22-65

0.930

ICU mortality, %

10.2

 

23.7

 

18.8

 

0.010

28-d mortality, %

5.7

 

21.7

 

15.8

 

0.001

Hospital mortality, %

12.5

 

38.2

 

28.8

 

<0.001

Survivor analysis, n

77

 

93

 

170

  

To nursing home, %

11.7

 

24.7

 

18.8

 

0.032

  1. APACHE, Acute Physiologic and Chronic Health Evaluation; BMI, Body mass index; IQR, interquartile range.
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