Table 1 Baseline demographic and clinical data in COPD patients who were candidates for long-term oxygen treatment (LTOT), among COPD patients who participated in outpatient clinic rehabilitation and an institutional rehabilitation program for COPD patients

Demographic data

 Female, n (%)

16 (70)

28 (46)

67 (54)

0.165

 Age, years, mean (sd)

71.9 (7.1)

65.8 (7.2)

64.1 (7.9)

< 0.001

 BMI, kg/m², mean (sd)

25.2 (7.2)

25.4 (5.4)

24.7 (5.6)

0.693

 Coronary Heart Disease, n (%)

2 (10)

11 (18)

12 (10)

0.300

Smoking history

 Pack years, mean (sd)

46.0 (31.6)

42.3 (20.9)

35.0 (18.5)

0.020

 Current, n (%)

0 (0)

27 (44)

23 (19)

< 0.001

Clinical data

 SBP, mmHg, mean (sd)

129 (17.9)

132 (28.0)

138 (18.4)

0.089

 Arterial HT, n (%)

14 (61)

29 (48)

49 (42)

0.234

 LTOT-users, n (%)

0 (0)

1 (2)

13 (11)

0.015

 Diabetes mellitus, n (%)

1 (4)

10 (16)

7 (6)

0.074

Pulmonary function, mean (sd)

 Spirometry

 FVC, Litres

2.1 (0.79)

3.1 (0.96)

2.5 (0.87)

< 0.001

 FEV1, Litres

1.0 (0.70)

1.5 (0.58)

1.1 (0.52)

< 0.001

 FEV1/FVC, %

50 (24)

53 (14)

44 (10)

0.001

Arterial blood gases

 Oxygen-tension, kPa

7.6 (1.1)

10.6 (2.3)

8.9 (1.4)

< 0.001

 CO2-tension, kPa

5.6 (0.90)

4.9 (0.78)

5.7 (0.91)

< 0.001

 CAT-score

22.0 (10.6)

19.0 (7.8)

18.4 (6.2)

0.109

Laboratory data, gm (gsd)

 Haemoglobin, g/dL

14.3 (2.0)

14.3 (1.6)

14.5 (1.3)

0.575

 Leucocytes, 10⁹/L

7.3 (1.5)

6.8 (1.7)

7.6 (1.3)

0.167

 C-Reactive Protein, mg/L

5.1 (4.1)

3.2 (2.5)

2.6 (3.0)

0.021

 Creatinine, µmol/L

68.2 (1.5)

74.8 (1.2)

75.0 (1.2)

0.241

 cTnT, ng/L

16.6 (2.8)

7.1 (2.2)

3.9 (3.4)

< 0.001

Electrocardiogram, n (%)

 Pathological Q-wave

3 (13)

8 (13)

11 (9)

0.738

 Left Bundle Branch Block

1 (4)

1(2)

2 (2)

0.721