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Table 2 Main differences between the population in which the 2008 score was developed and the present population. All p ≤ 0.001

From: A clinical in-hospital prognostic score for acute exacerbations of COPD

Variable

Present population

2008 population

Sex, % women

23.2

30.0

Age (years, mean ± SD )

70.3 ± 11.3

72.5 ± 11.8

Smoking status, %

  

Non smoker

6.6

19.3

Ex smoker

60.8

49.9

Smoker

32.6

30.8

MRC dyspnea grade at steady state, %

  

0/1

17.1

22.5

2-3

69.9

46.2

4

13.0

31.3

Maintenance treatment, %

  

LTOT

37.7

23.2

Inhaled corticosteroids

72.4

43.8

Oral corticosteroids

7.8

13.8

Bronchodilators

86.6

69.6

Clinical signs of severity, %

  

Cyanosis

22.1

29.0

Use of accessory inspiratory muscles

27.9

50.9

Paradoxical abdominal movement

8.6

36.8

Asterixis

1.8

7.8

Neurological impairment

6.9

11.8

Lower limb edema

13.3

23.3

Number of clinical signs of severity, %

  

None

44.1

27.6

1 -2

45.9

47.7

 ≥ 3

10.0

24.7

Mortality (%)

2.5

7.9