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Table 1 Demographic and functional characteristics of the study population

From: Assessment of the alveolar volume when sampling exhaled gas at different expired volumes in the single breath diffusion test

  

"Healthy" individuals (n = 30)

COPD patients (n = 50)

Significance

Age

years

65 ± 6

68 ± 6

ns

Weight

Kg

71 ± 10.48

75 ± 12.53

ns

Height

cm

162 ± 9.58

168 ± 6.44

p < .0038

BMI

Kg/m2

27 ± 4

27 ± 6

ns

Pack-years

n

0

43.4 ± 17.5

NA*

Males

%

47

92

NA*

Hemoglobin

g/dl

13.97 ± 1.07

14.55 ± 1.07

p < .02

FVC

%pred

120 ± 13

84 ± 17

p < .0001

FEV1

%pred

116 ± 15

45 ± 12

p < .0001

FEV1/VC

%pred

97 ± 7

53 ± 13

p < .0001

VC

%pred

119 ± 13

87 ± 16

p < .0001

RV

%pred

102 ± 22

145 ± 37

p < .0001

TLC

%pred

106 ± 11

106 ± 14

ns

RV/TLC

%pred

95 ± 15

131 ± 22

p < .0001

DLCO

%pred

95 ± 17

64 ± 22

p < .0001

VA

%pred

93 ± 10

80 ± 13

p < .0001

DL/VA

%pred

97 ± 14

71 ± 26

p < .0001

  1. Demographic and functional characteristics of the study population.
  2. Data are expressed as mean ± standard deviation. Significant differences appear at the 0.05 level.
  3. Abbreviations and references for the predicted formulas of each variable can be seen in the text. * Not applicable
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BMC Pulmonary Medicine

ISSN: 1471-2466

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