Table 1. Baseline patient characteristics (N = 29).

Characteristics	IPF (n = 20)	COP (n = 9)
Male	16 (80)	5 (55.5)
Age, yr	65.0 ± 6.8	65.7 ± 7.1
Smoking history	13 (65.0)	3 (33.3)
FVC, mL	2,773 ± 980	2,804 ± 1,027
FVC, % of predicted	78.4 ± 19.2	77.7 ± 20.6
DLCO, mmol/min/kPa	12.2 ± 5.6	11.9 ± 5.4
DLCO, % of predicted	66.2 ± 24.6	65.5 ± 22.8

Data are presented as number (%) or mean expression score ± standard deviation.

IPF = idiopathic pulmonary fibrosis, COP = cryptogenic organizing pneumonia, FVC = forced vital capacity, DLCO = diffusing capacity of the lungs for carbon monoxide.