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Table 1 Population characteristics. Figures are means (SD).

From: Patterns of inflammation and the use of reversibility testing in smokers with airway complaints

  COPD n = 17 Asthma n = 11 CB n = 14 HS n = 17
Age (range) 61.4 (41–74) 57.6 (36–73) 53.9 (34–72) 54.6 (42–64)
Gender (f/m) 2/15* 3/8 5/9 11/6*
Smoking status (former/current) 6/11 5/6 4/10 7/10
Packyears 48.4* (29) 23.1* (20) 33.5 (18) 32.3 (13)
FEV1/FVC postBD 0.56 (0.13)* 0.70 (0.17) 0.73 (0.2) 0.77 (0.22)*
FEV1 postBD (%pred) 59.0* (17) 82.1 (17) 100.7* (17) 103.9* (19)
BD-Reversibility (Δ FEV1 %pred) 3.5 (9) 12.1* (7) 4.5 (5) 4.9 (4)
  1. *:p < 0.05 using ANOVA analysis.
  2. CB = chronic bronchitis; HS = healthy smokers