Table 3. Cut-off values for QUI and QUI T-score of the calcaneal QUS and radial SOS and its T-score of the multisite QUS to identify women and men with a high or low likelihood of osteoporosis.

	Women (n=131)			Men (n=109)
QUS variables	Cut-off value	Specificity	Sensitivity	Cut-off value	Specificity	Sensitivity
QUI lower threshold	63,80	0,902	0,184	67,85	0,903	0,169
QUI best compromise	76,75	0,720	0,714	79,55	0,736	0,730
QUI upper threshold	85,1	0,488	0,898	93,0	0,361	0,919
QUI T-score lower threshold	-2,28	0,902	0,184	-2,35	0,903	0,189
QUI T-score best compromise	-1,53	0,720	0,714	-1,68	0,722	0,703
QUI T-score upper threshold	-1,03	0,427	0,898	-0,88	0,375	0,919
Radial SOS lower threshold	3935,5	0,902	0,327	3888,5	0,903	0,162
Radial SOS best compromise	4073,0	0,598	0,592	4073,5	0,472	0,486
Radial SOS upper threshold	4254,0	0,232	0,898	4249,0	0,097	0,919
rSOS T-score lower threshold	-2,35	0,902	0,327	-1,85	0,903	0,108
rSOS T-score best compromise	-0,95	0,585	0,592	-0,25	0,444	0,486
rSOS T-score upper threshold	0,85	0,232	0,898	1,15	0,083	0,919
QUI: Quantitative Ultrasound Index; QUS: Quantitative ultrasound; SOS: Speed of sound; rSOS: Radial SOS.