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Table 1 General characteristics of patients at baseline (means ± SD) and their statistical comparison ( t test)

From: Cognitive dysfunction in severe chronic obstructive pulmonary disease (COPD) with or without Long-Term Oxygen Therapy (LTOT)

 

without LTOT (n = 73)

with LTOT (n = 73)

p

age (ys)

70.9 ± 8.9

71.2 ± 9.1

ns

FEV 1 % pred.

40.2 ± 10.3

41.6 ± 11.1

ns

FEV 1 /FVC

437 ± 9.2

44.2 ± 10.2

ns

BMI

27.5 ± 5.1

27.9 ± 6.4

ns

Active smokers

9.6%*

6.8%*

ns

Former smokers

69.9%*

72.6%*

ns

PaO 2 (mmHg)

53.3 ± 7.9

54.2 ± 8.3

ns

PaCO 2 (mmHg)

45.8 ± 9.9

46.1 ± 10.2

ns

CAT score

19.9 ± 4.9

18.8 ± 5,6

ns

MRC scale

2.8 ± 0.7

2.7 ± 0.8

ns

C.M.I.

4.2 ± 2.0

4.3 ± 1.9

ns

  1. *Smoking history is indicated in % active or former smokers.