Table 1 Baseline characteristics of participants

Age (years)

64.58 ± 9.06

66.11 ± 9.08

^† 0.611

Gender (male/female, n%)

14 (73.7%) /5 (26.3%)

15 (83.3%) /3 (16.7%)

^*0.693

BMI, kg/m²

22.90 ± 3.71

25.22 ± 0.82

^† 0.058

Years of COPD

11.12 ± 4.66

10.28 ± 5.67

^† 0.640

COPD stage, n (%)

^* 0.834

 Grade I

2 (11%)

1 (6%)

 Grade II

11 (58%)

10 (55%)

 Grade III

5 (26%)

7 (39%)

 Grade IV

1 (5%)

0 (0%)

mMRC score, n (%)

^* 0.598

 Grade 0

1 (5%)

2 (11%)

 Grade 1

3 (16%)

3 (17%)

 Grade 2

11 (58%)

12 (67%)

 Grade 3

4 (21%)

1 (5%)

 Grade 4

0 (0%)

0 (0%)