Table 1.

Patient Demographics

Characteristics	Healthy Volunteers (n = 6)	Patients
		IPF (n = 8)	Organizing Pneumonia (n = 6)
Male sex, n (%)	2 (33)	5 (63)	5 (83)
Age, yr, mean ± SD	55 ± 28	65 ± 12	63 ± 16
Age distribution, n (%)
15 to <25	2 (33)	0 (0)	0 (0)
25 to <50	0 (0)	0 (0)	1 (17)
50 to <80	4 (67)	8 (100)	5 (83)

Definition of abbreviation: IPF = idiopathic pulmonary fibrosis.

Two of the patients with organizing pneumonia presented with a mixed usual interstitial pneumonia/organizing pneumonia pathology.