Table 3.

Correlation of IVUS with reference to OCT when stratified according to lipid content subgroups as identified on IVUS.

	Specificity (%)	Sensitivity (%)	PPV (%)	κ	ROC area	LR+	LR−
Deep lipid content	97.0	17.9	95	0.08	0.57	6.00	0.85
Superficial lipid content	97.0	6.3	88	0.02	0.52	2.10	0.97
1 quadrant lipid content	93.9	22.7	93	0.09	0.58	3.72	0.82
2 quadrant lipid content	100.0	1.8	100	0.01	0.51	∞	0.98

PPV: positive predictive value; ROC area: area under Receiver Operating Characteristic curve; LR+: likelihood ratio positive; LR−: likelihood ratio negative