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Table 2: Diagnostic performance of individual parameters in the detection of glioma recurrence^{^a}
rCBV_mean ≥ 1.709 ADC_mean ≤ 1507 Cho/Cr ≥ 1.405 TBR_max ≥ 1.579 TBR_mean ≥ 1.179
Sensitivity 82.8% 86.7% 100.0% 93.3% 90.0%
Specificity 63.6% 54.5% 66.7% 72.7% 81.8%
PPV 85.7% 83.9% 88.9% 90.3% 93.1%
NPV 58.3% 60.0% 100.0% 80.0% 75.0%
Accuracy 77.5% 78.0% 90.9% 87.8% 87.8%
AUC±SE 0.68 ± 0.111 0.752 ± 0.015 0.861 ± 0.08 0.827 ± 0.078 0.888 ± 0.059
P value .008^{^b} .013^{^b} <.001^{^b} <.001^{^b} <.001^{^b}
Note:—PPV indicates positive predictive value; NPV, negative predictive value; SE, standard error.
↵a The ADC_mean value is expressed as ×10⁻⁶mm²/s and rCBV_mean. Cho/Cr, TBR_max, _and TBR_mean are ratios and hence unitless. P values mentioned are generated while calculating the AUC from the ROC analysis.
↵b P values of rCBV_mean, ADC_mean, Cho/Cr, TBR_max, and TBR_mean are <.05 and hence are statistically significant. P value reflects the significance of the ROC analysis of individual parameters represented in the table.