Table 2.

Mean Lung Occupied and Agreement between Visual and Adaptive Multiple Features Method High-Resolution Computed Tomography Feature Scores

	Mean Feature Score*			Bland-Altman Analysis		Correlation
HRCT Feature	Visual	AMFM	P Value	Mean Difference	95% Limits of Agreement	r	95% CI	P Value†
Ground glass	0.01 (0.03)	0.20 (0.11)	<0.0001	−0.19	−0.41 to 0.03	0.23	0.12 to 0.33	<0.0001
Ground glass reticular	0.12 (0.07)	0.15 (0.10)	<0.0001	−0.03	−0.19 to 0.14	0.60	0.52 to 0.67	<0.0001
Honeycombing	0.04 (0.04)	0.09 (0.14)	<0.0001	−0.05	−0.31 to 0.22	0.29	0.18 to 0.39	<0.0001
Emphysema	0.01 (0.02)	0.01 (0.02)	0.26	0.002	−0.06 to 0.06	0.06	−0.06 to 0.17	0.34
Normal	0.81 (0.11)	0.55 (0.17)	<0.0001	0.26	−0.09 to 0.60	0.30	0.19 to 0.40	<0.0001

Definition of abbreviations: AMFM = adaptive multiple features method; CI = confidence interval; HRCT = high-resolution computed tomography.

Analysis includes all HRCTs scored visually and by AMFM (n = 292).

^*Shown is the mean proportion (SD) of total lung having each HRCT feature by visual and AMFM analysis. P value is for the difference between visual and AMFM mean using paired t test.

^†P value compares correlation with 0 (no correlation).