Table 3.

Diagnostic performance of histogram variables for differentiating low-risk thymoma from high-risk thymoma and thymic carcinoma

Variables	Cut-off value	AUC	Sensitivity (100%)	Specificity (100%)
ADC histogram
ADCmean	1.268	0.857 (0.731–0.983)	91.30 (72.0–98.9)	71.43 (41.9–91.6)
ADCmedian	1.221	0.870 (0.750–0.990)	86.96 (66.4–97.2)	78.57 (49.2–95.3)
ADC10	0.689	0.957 (0.881–1.000)	95.65 (78.1–99.9)	92.86 (66.1–99.8)
ADC90	1.608	0.823 (0.691–0.955)	60.87 (38.5–80.3)	92.86 (66.1–99.8)
ADCHS-ROI	1.183	0.832 (0.690–0.974)	86.96 (66.4–97.2)	78.57 (49.2–95.3)

Data in parentheses indicate 95% confidence intervals. AUC indicates largest area under the ROC curve.

ADC, apparent diffusion coefficient; ADCn, nth percentile value of cumulative ADC histogram.