Table 3.

Bone density and texture variables from X-ray images with minimal post-processing in the elastic net model to discriminate healthy (n = 56) and subjects with radiographic knee osteoarthritis (n = 50).

Variable	Coefficient
Intercept	− 0.111
GVmmAl in ROI7	0.470
FDVer,0.59mm in medial SB	0.003
FDVer,0.44mm in ROI7	0.174

SB subchondral bone, ROI region of interest, GV_mmAl mean grayscale value calibrated with aluminum step wedge, FD_Ver fractal dimension of vertical structures