Table 1

Accuracy (%) for detection of cholesterol and calcification in 1 mm and 2 mm artery sections by Raman spectroscopy

	1 mm section			2 mm section
	Cholesterol	Calcification	β Carotene	Cholesterol	Calcification	β Carotene
Cut-off values of 4% (wt/wt), 6% (wt/wt) and 4.0×10⁻³ au were used for cholesterol, calcification, and β carotene, respectively. The contribution of β carotene was used as an indirect marker for detection of cholesterol (in bold).
NPV, negative predictive value; PPV, positive predictive value.
Sensitivity	87	81	78	87	78	92
Specificity	86	95	95	95	97	95
NPV	91	94	97	97	94	95
PPV	80	86	74	80	86	92