Table 5.

A comparison of HRCT density distribution of lesions in different age groups.

	A	B	C	D	F	P
PGGO (n)	0.6 ± 0.7(5)	3.0 ± 4.5(139)	2.2 ± 3.5 (52)	1.9 ± 3.8(37)	1.069	0.366*
GGO + crazy paving pattern/ interlobular septa thickening (n)	0.1 ± 0.4(1)	1.8 ± 3.3(82)	5.6 ± 5.8 (134)	6.3 ± 5.9(125)	7.771	<0.001*
Mixed GGO with consolidation<50 %(n)	0.4 ± 0.7(3)	0.5 ± 1.3(23)	0.6 ± 1.2 (14)	0.3 ± 0.8(5)	0.351	0.788*
Pure consolidation (n)	0.1 ± 0.4(1)	0.3 ± 0.7(13)	0.5 ± 0.9 (11)	0.3 ± 0.7(5)	0.569	0.637*
Mixed GGO with consolidation≥50 % (n)	0 (0)	0.3 ± 1.0(15)	1.0 ± 2.1 (24)	0.6 ± 1.4(12)	1.601	0.194*

(n) = number of lesions.

Abbreviations: GGO, ground-glass opacity; HRCT, high-resolution computed tomography; PGGO, pure ground-glass opacity.

Data are expressed as mean ± standard deviation.

^*The mean difference is significant at a level of 0.05.