Table 7.

WOMAC score as the demarcation criterion.

Outcome	AUC	Youden index	Threshold value	Sensitivity	Specificity	95% CI	P value
TPSTR	0.559	–	–	–	–	(0.457–0.661)	.257
FIASTR	0.571	–	–	–	–	(0.457–0.661)	.174
PASTR	0.612	0.254	2.635	0.406	0.847	(0.457–0.661)	.032
MTSTR	0.564	–	–	–	–	(0.461–0.666)	.223

AUC = area under the curve, CI = confidence interval, FIASTR = femoral intercondylar apex soft tissue ratio, MTSTR = medial tibial soft tissue ratio, PASTR = patella apical soft tissue ratio, TPSTR = tibial plateau soft tissue ratio, WOMAC = Western Ontario and McMaster University Osteoarthritis.