Table E6.

Component loading of selected variables

	Components
	1	2	3
RB1 LA/BSA	0.949*	0.020	0.117
RB1 LV	0.935	0.021	−0.024
RB1 TA	0.905	0.050	0.231
RB1 WA/BSA	0.876	0.021	0.249
RB1 WV	0.831	0.045	0.049
RB1 % WV	−0.682	0.035	0.180
MLD E/I	0.054	0.937*	−0.101
VI-850/−950 E-I	−0.102	0.901	0.090
Expiratory VI −850	0.138	0.757	−0.427
Expiratory LAC-D −850	−0.063	−0.301	0.745*
Inspiratory Dav	0.244	0.054	0.610

Rotated component matrix

Extraction method: principal component analysis

Rotation method: Varimax with Kaiser normalization

Component loading of the 11 original variables with the 3 main components derived by means of factor analysis in the 62 asthmatic patients is shown, with the predominant variable in each component indicated by an asterisk.

LAC-D −850, Fractal dimension of low attenuation cluster at a threshold of −850 HU; TA, total area.