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Table 3 Univariate analysis of Initial SAPS distribution and 30-day mortality by body mass index category.

From: Lower short- and long-term mortality associated with overweight and obesity in a large cohort study of adult intensive care unit patients

 

Total

(16,812)

Underweight

(786)

Normal

(5,463)

Overweight

(5,276)

Obese

(5,287)

SAPS category (maximum possible, 56)

n(%)

Mortality %

n (%)

Mortality %

n (%)

Mortality %

n (%)

Mortality %

n (%)

Mortality %

≤ 4

1,152 (6.9%)

3.6%

42

(5.3%)

7.1%

356

(6.5%)

5.6%

387

(7.3%)

3.1%

367

(6.9%)

1.6%a

5-6

1,425

(8.5%)

4.9%

63

(8.0%)

4.8%

440

(8.1%)

6.6%

449

(8.5%)

3.8%

473

(8.9%)

4.4%

7-8

1,969

(11.7%)

7.4%

93

(11.8%)

19.4%a

648

(11.9%)

7.6%

593

(11.2%)

7.3%

635

(12.0%)

5.5%

9-10

2,193

(13.0%)

9.7%

117

(14.9%)

14.5%

731

(13.4%)

12.7%

694

(13.2%)

9.2%a

651

(12.3%)

5.8%a

11-12

2,362

(14.0%)

12.1%

122

(15.5%)

19.7%

754

(13.8%)

15.7%

713

(13.5%)

12.1%a

773

(14.6%)

7.5%a

13-14

2,321

(13.8%)

13.1%

95

(12.1%)

23.2%

732

(13.4%)

16.3%

740

(14.0%)

11.0%a

754

(14.3%)

10.7%a

15-16

2,016

(12.0%)

16.6%

92

(11.7%)

35.9%a

629

(11.5%)

19.9%

672

(12.7%)

14.7%a

623

(11.8%)

12.5%a

17-18

1,511

(9.0%)

18.1%

62

(7.9%)

24.2%

493

(9.0%)

20.3%

473

(9.0%)

14.2%a

483

(9.1%)

19.1%

19-20

862

(5.1%)

23.1%

47

(6.0%)

40.4%a

309

(5.7%)

26.2%

268

(5.1%)

19.4%

238

(4.5%)

19.8%

> 20 (21-35)b

1,001

(6.0%)

47.4%

53

(6.7%)

58.5%

371

(6.8%)

47.4%

287

(5.4%)

42.9%

290

(5.5%)

49.7%

  1. aP < 0.05 compared with normal weight. bWe followed the original SAPS study, which grouped all of the patients with SAPS > 20 in one category, and the maximum SAPS we observed was 35.
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