Table 2.

Correlations between time until CT and all radiological indexes at initial CT examination

		Correlation coefficient (r)	p value
Quantitative index	% Normal lung	0.08	0.64
	% GGO	− 0.45	0.005
	% Reticulation	0.12	0.47
	% Consolidation	0.48	0.002
	% Emphysema	0.06	0.71
	% Nodular lesion	− 0.13	0.45
	% Honeycombing	− 0.24	0.15
Qualitative index	CT disease severity score	0.46	0.009