Table 1 Baseline characteristics of the “PR + maintenance” COPD patients

Sex ratio (%males)

56.9%

Age years

66.26 (8.48)

BMI kg/m²

26.59 (5.29)

FEV₁ %pred

63.18 (25.78)

FEV₁/VC

52.73 (13.24)

Disease severity (GOLD)

 I

25.6%

 II

40.6%

 III

24.8%

 IV

9.0%

Smoking history pack-year

37.89 (25.81)

BODE Index

2.64 (1.88)

6MWD m

454.51 (97.98)

6MWD %pred

74.38 (17.07)

MRC

2.45 (1.26)

VQ11

25.53 (8.28)

Comorbidities

 Mean number of comorbidities per patient

2.26 (1.72)

 Pulmonary n (% total)

66 (45.8%)

 Cardiovascular n (% total)

86 (59.7%)

 Metabolic n (% total)

47 (32.6%)

 Neurologic n (% total)

7 (4.9%)

 Joint and muscle disorders n (% total)

16 (11.1%)

 Others n (% total)

23 (16.0%)