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LNR最佳截断点的选择
Selection of the best cut-off point for LNR. A: The colors of the plot represent the strength of correlation, ranging from low (dark, black) to high (green or red). An indirect correlation between a factor and the patients' survival is colored red, and a positive correlation colored green. B: Histogram showing the optimal cutoff point; C: Kaplan-Meier curve corresponding to the cutoff point
