Table 3.

Diagnostic performance to detect lipid rich plaque at best cut point LAP area according to HU cut-off.

	Overall	Values at cut point of plaque area
	AUC (95% CI)	LAP area (mm2)	AUC	Accuracy (95% CI)	Sensitivity (95% CI)	Specificity (95% CI)	Positive predictive value (95% CI)	Negative predictive value (95% CI)
−30–30 HU	0.52 (0.45–0.59)	0.05	0.52 (0.46–0.59)	0.64 (0.54–0.73)	0.14 (0.05–0.29)	0.91 (0.82–0.97)	0.46 (0.17–0.77)	0.66 (0.56–0.75)
−30–45 HU	0.52 (0.43–0.61)	0.17	0.54 (0.47–0.62)	0.65 (0.55–0.74)	0.19 (0.08–0.35)	0.90 (0.80–0.96)	0.50 (0.23–0.77)	0.67 (0.56–0.77)
−30–60 HU	0.57 (0.46–0.67)	0.12	0.57 (0.48–0.67)	0.64 (0.54–0.73)	0.35 (0.20–0.53)	0.79 (0.68–0.88)	0.48 (0.29–0.68)	0.69 (0.58–0.79)
−30–75 HU	0.64 (0.53–0.74)	0.14	0.65 (0.56–0.75)	0.68 (0.58–0.76)	0.57 (0.40–0.73)	0.74 (0.61–0.84)	0.54 (0.37–0.70)	0.76 (0.64–0.86)
−30–90 HU	0.64 (0.54–0.75)	0.41	0.64 (0.55–0.74)	0.67 (0.57–0.76)	0.57 (0.40–0.73)	0.72 (0.60–0.82)	0.53 (0.36–0.69)	0.75 (0.63–0.85)

LAP, low attenuation plaque; HU, hounsfield unit; AUC, the area under the curve; CI, confidence interval.