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Table 1 Baseline characteristics of the sample; mean values and standard deviations are shown unless otherwise noted

From: Biomarkers of systemic inflammation and depression and fatigue in moderate clinically stable COPD

 

All

Ex-smokers

Current smokers

P - value

Number

120

86 (71.7%)

34 (28.3%)

 

Age, yrs

66 ± 6.7

67 ± 6.9

64 ± 6.6

0.03

Females (%)

46 (38%)

30 (35%)

16 (47%)

0.4*

FEV1 %

52.5 ± 18.5

53.5 ± 18.5

47.8 ± 17.7

0.12

PaO2 (kPa)

9.2 ± 1.4

9.1 ± 1.1

9.3 ± 1.2

0.4

PaCO2 (kPa)

5.2 ±.58

5.1 ± 0.5

5.3 ± 0.7

0.05

MCFS

25.1 ±12.5

23.9 ± 12

28 ± 13.5

0.11

CES-D Median (IQR)

10 (12)

9 (12)

11 (11)

0.4#

BMI (kg/m2)

27.5 ± 5.8

27.9 ± 5.5

26.5 ± 6.4

0.22

FFMI (kg/m2)

17.8 ± 3.1

18.3 ± 3.2

17.2 ± 3.6

0.09

Pack/years Median (IQR)

40 (25.8)

38.3 (31.1)

41.9 (22.5)

0.8#

  1. # Mann-Whitney U Test; * x2-Test; IQR = Interquartile Range; FEV1 % = Forced Expiratory Volume over 1 second of predicted; PaO2 = Arterial oxygen partial pressure; kPa = kilo Pascal; PaCO2 = Arterial carbon dioxide pressure; MCFS = Manchester COPD Fatigue Scale; CES-D = Centre for Epidemiologic Studies Depression Scale; BMI = Body Mass Index; FFMI = Fat-Free Mass Index.