Table 6.

Adjusted R${}^2$ values from the ridge regression models that included all of %LAA, NJC, D, and ACS (Full) or just the former three (Red.).

Outcome	Adj. R${}^2$ (Red.)	Adj. R${}^2$ (Full)
FEV${}_1$	0.576	0.646
SGRQ(Total)	0.310	0.395
6MWD	0.267	0.334
FEV${}_1$/FVC	0.624	0.709
%GT	0.793	0.855
FRC	0.606	0.660
FRC/TLC	0.358	0.436

LAA low attenuation area, NJC normalized join-count, ACS average cluster size, FEV${}_1$ forced expiratory volume in one second, FVC forced vital capacity, 6MWD 6-minute walk distance, FRC functional residual capacity, TLC total lung capacity, GT gas trapping.