Table 2. Main diagnostic characteristics of patients with cryptogenic organizing pneumonia.

		Cryptogenic organizing pneumonia (n=84)
Pathological diagnosis (biopsy-proved)
	Yes, n (%)	78 (92.9)
Type of diagnosis
	Transbronchial	37 (44)
	Tru-cut	32 (38.1)
	Wedge	9 (10.7)
	Clinical/radiological	6 (7.1)
CT findings
Distribution
	Unilateral, n (%)	50 (59.5)
	Bilateral, n (%)	34 (40.5)
Pattern
	Cavity, n (%)	2 (2.4)
	Focal infiltration, n (%)	24 (28.6)
	Ground-glass opacification, n (%)	21 (25)
	Nodule, n (%)	26 (31)
	Air bronchograms, n (%)	11 (13.1)
Exacerbation season
	Spring, n (%)	33 (39.3)
	Summer, n (%)	10 (11.9)
	Autumn, n (%)	22 (26.2)
	Winter, n (%)	19 (22.6)