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Receiver-operating characteristics (ROC) curves. a) For a PVR of 6 WU, a TRV/VTIRVOT value of 0.14 provided a sensitivity of 96.67% and a specificity of 92.86% (Area under the curve 0.963, 95% CI 0.858 to 0.997), b) For PVR of 8 WU, a TRV/VTIRVOT value of 0.17 provided a sensitivity of 79.17% and a specificity of 95% (area under the curve 0. 0.923, 95% CI 0.801 to 0.982)
