Smoking status and anti-inflammatory macrophages in bronchoalveolar lavage and induced sputum in COPD

Respiratory Research

Table 1 Patient characteristics for current and ex-smokers with COPD

	Smokers (n = 72)	Ex-smokers (n = 42)
Males (n (%))	59 (81.9)	40 (95.2)*
Age (years)	60.1 (7.7)	64.1 (7.2)*
Packyears	43.3 (32.4-55.6)	36.8 (27.5-53.1)
Smoking cessation (years)		3.5 (1.0-9.8)
FEV₁ post-bronchodilator (L)	2.02 (0.46)	2.05 (0.46)
FEV₁ post-bronchodilator (%pred)	63.3 (8.3)	62.5 (9.6)
FEV₁/IVC% post-bronchodilator	49.5 (8.5)	46.0 (8.3)*
K_CO (%pred)	73.3 (25.1)	80.4 (25.9)

Data are presented as mean (SD) or median (IQR) unless otherwise stated. These patient characteristics have been previously described [7].
pred = predicted; FEV₁ = forced expiratory volume in one second; IVC = inspiratory vital capacity; K_CO = carbon monoxide transfer coefficient.
* p < 0.05 compared with smokers with COPD (χ² test for sex differences, two tailed unpaired t-tests for other data).

ISSN: 1465-993X