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Ratio of apparent diffusion coefficient (ADC)median to the mean ADC of the non-lesion area (RADCmedian) value could be divided into two groups using the median value (0.71) as the boundary value (χ2=5.12, P=0.02). The average disease progressive-free survival (PFS) was 20.71±3.41 months in the RADCmedian group with a value ≥0.71 [95% confidence interval (95% CI), 23.39−35.91], and 26.65±3.19 months in the RADCmedian group with a value <0.71 (95% CI, 14.02−27.41).
