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a: the survival curve of the whole sample group, b: the survival curve of the training group, c: the survival curve of the text group. The high-risk group and the low-risk group are divided by the median value of the risk score, with red representing the survival curve of the high-risk group and blue representing the survival curve of the low-risk group. Among the three groups, the high-risk group had a worse prognosis than the low-risk group.
