Deep vein	Blinded	Consensus reading				Interobserver agreement	Sensitivity (95% CI)	Specitivity (95% CI)
Deep vein	Dense vein sign	tp	fp	tn	fn	Interobserver agreement	Sensitivity (95% CI)	Specitivity (95% CI)
SS	2	2	0	214	4	1.00	33.3	100
LICV	2	2	0	218	0	1.00	50	100
RICV	2	2	0	218	0	1.00	50	100
VG	2	2	0	218	0	1.00	100	100
LBVR	0	0	0	220	0	-	-	-
RBVR	0	0	0	220	0	-	-	-
LTSV	2	2	0	218	0	0	50	100
RTSV	2	2	0	218	0	0	50	100
total	12	12	0	1744	4	1.0	75	100