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a: The nomogram of the risk score. We take the 15th sample as an example, with a total score of 396 points for each item. Therefore, the probability of his survival over 1 year is 82%, the probability of his survival over 3 years is 66.2%, and the probability of his survival over 5 years is 55.9%. b: Calibration curves for risk scores predicting patients at 1, 3, and 5 years.
