Table 5.
Diagnostic efficacy of the IVIM-DWI parametric values in the differentiation between the GR and PR groups.
| Parameter | AUC (95% CI) | Cut-off value | Sensitivity | Specificity | PPV | NPV | P |
|---|---|---|---|---|---|---|---|
| postD | 0.790(0.642–0.939) | 1.64 × 10−3 mm2/s | 53.3% | 100% | 100% | 79.4% | 0.325a |
| ∆%ADC | 0.701(0.541–0.861) | 47.6% | 73.3% | 70.4% | 57.9% | 82.6% | 0.113b |
| ∆%D | 0.807(0.674–0.941) | 41.8% | 93.3% | 59.3% | 56.0% | 94.1% | 0.811c |
IVIM-DWI, intravoxel incoherent motion diffusion-weighted imaging; GR, good response; PR, poor response; D, pure diffusion coefficient; ADC, apparent diffusion coefficient; AUC, area under the curve; CI, confidence interval; PPV, positive predictive value; NPV, negative predictive value; apostD vs ∆%ADC, b∆%ADC vs ∆%D, cpostD vs ∆%D.