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. 2014 Mar 1;14:30. doi: 10.1186/1471-2466-14-30

Table 1.

Demographics

 
 2006/2007 Complete cohort
 2006/2007 Data for subjects studied in 2012
 2012 Data
  Healthy smokers (N = 23) COPD smokers (N = 24) Healthy smokers (N = 11) COPD smokers (N = 13) Healthy smokers (N = 11) COPD smokers (N = 13)
Female/male
 6/17
 6/18
 4/7
 4/9
 4/7
 4/9
Age [years]a
 54 (42, 65)
 54 (46, 68)
 56 (51, 61)
 53 (50, 56)
 60 (56, 66)
 58 (55, 61)
BMI [kg/m2]
 25.4 ± 2.5
 25.3 ± 3.4
 25.5 ± 1.8
 24.4 ± 3.0
 26.7 ± 3.0
 25.5 ± 3.9
Pack-years &
 34.0 (21.0)
 48.0 (15.5)***
 32.0 (21.0)
 47.0 (15.0)
 37.5 (16.8)
 50.1 (16.7)
Cotinine (ng/mL)
 1262 ± 722
 1561 ± 968
 1232 ± 548
 1620 ± 748
 867 ± 659
 1585 ± 678
FEV1 [L]
 3.8 ± 0.8
 2.0 ± 0.3***
 3.5 ± 0.6
 2.0 ± 0.3
 3.2 ± 0.5
 1.5 ± 0.5
FEV1 % pred.
 112.5 ± 14.1
 60.5 ± 6.8***
 114.9 ± 12.8
 60.7 ± 5.5
 109,6 ± 14.2
 47.3 ± 15.0
FVC [L]
 5.1 ± 1.0
 4.2 ± 0.9**
 4.7 ± 0.9
 4.3 ± 0.8
 4.5 ± 0.7
 3.6 ± 0.8
FEV1/FVC [%]
 75.4 ± 5.0
 48.7 ± 7.4***
 74.3 ± 5.1
 48.2 ± 6.7
 71.1 ± 4.2
 41.0 ±11.7
pO2 [mm Hg] 82.9 ± 9.7 73.3 ± 5.3*** 81.2 ± 9.2 75.1 ± 5.7 76.5 ± 7.4 69,2 ± 7.6

In 2012: COPD smokers: 2 quit smoking, 2 reduced smoking; healthy smokers: 2 quit smoking, 1 reduced smoking.

a:presented as mean (minimum, maximum), all other data is presented as mean ± SD, ** = p < 0.01, *** = p < 0.005 & median (IQR).