Table 1 Demographic characteristics of study participants

Age (years)

66 (79–54)

68 (84–56)

0.86

Gender (female/male)

0/21

0/29

1

Duration of COPD (year)

5 (1–25)

4 (0.5–21)

0.15

Smokers/ex-smokers

9/21

14/29

-

Smoking (pack/year)

56 (82–20)

55 (60–20)

0.76

BMI (kg/m²)

27 (35–20)

26 (38–19)

0.23

Post BD FEV1 (%predicted)

43% (15–50)

48% (17–49)

0.47

FEV1/FVC

32% (12-46%)

36% (20-54%)

0.13

MRC† Dyspnoea Score

2 (2–3)

2 (2–3)

0.61

Hospitalization in the previous year (number)

0.5 (0–1)

0.4 (0–1)

0.14

Pneumonia in the previous 3 years (number)

0.6 (0–1)

0.5 (0–1)

0.07

Non of ER visit because of exacerbation of COPD in the previous year (number)

1.1 (1–3)

1.0 (1–2)

0.09