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Table 1 Characteristics of hospital- and population-recruited COPD cases in the EconCOPD-study

From: Guideline adherence in hospital recruited and population based COPD patients

 

Population based COPD cases

Hospital recruited COPD patients

N

90

245

Female sex, %

34.4

40.0

Age, mean (SD) years

64.1 (10.4)

67.8 (9.5) **

BMI, mean (SD) kg/m2

26.2 (4.5)

25.1 (5.0) *

Education

 Primary, %

38.9

36.7

 High School, %

38.9

48.6

 University, %

22.2

14.7

Smoking habits

 Current smokers, %

45.6

32.2 *

 Pack year, mean (SD)

31.1 (34.1)

31.8 (29.8)

FEV1, mean (SD) %

64.7 (14.4)

47.1 (17.0) **

GOLD-stage**

 GOLD II, %

84.4

48.2 **

 GOLD III, %

10.0

33.9 **

 GOLD IV, %

5.6

18.0 **

Respiratory symptoms, %

74.4

95.9 **

 Dyspnoea at level ground %

6.7

38.1 **

 Cough, %

47.8

64.5 **

 Phlegm, %

48.9

62.9 *

Number of comorbidities, mean (SD), p50 (IQR)

1.2 (1.5), 1 (2)

1.9 (1.8), 1 (3) **

Number of prescribed drugs, mean (SD) p50 (IQR)

3.0 (2.9), 2.5 (5)

6.3 (4.0), 6 (6) **

  1. * = p-value < 0,05. ** = p-value < 0,01 by Kruskal-Wallis and Fishers´ exact test. SD = standard deviation. p50 = median. IQR interquartile range
  2. Low-threshold dyspnoea = Dyspnoea when walking at normal pace on flat ground, but not at rest
  3. Number of prescribed drugs includes all medication irrespective of cause