. 2013 Jan 31;8(1):e55612. doi: 10.1371/journal.pone.0055612

Table 2. Characteristics of COPD patients and healthy controls (PMNs).

	HEALTHY DONOR	COPD PATIENT GOLD STAGE I–III
Gender (m/f, n)	3/5	7/4
Age (yrs)	45 (26–63)	60 (35–72)
Current smoker/not current smoker (n/n)	0/8	5/6
Packyears (yrs)	-	31 (22–67)
FEV₁, % predicted	-	55.7 (27.9–99.9)
FEV₁/FVC, %	-	47 (27–70)

Data are presented as median (range).