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Calibration curves for these nomograms in training set (A) and validation set (B). The 45° dotted line represents the ideal reference, which means the nomogram-predicted survival probabilities (x-axis) exactly match the actual survival proportions (y-axis). Blue dots represent nomogram-predicted probabilities for each group, and black error bars represent the 95% CIs of these estimates. OS, overall survival; BCSS, breast cancer-specific survival; CI, confidence interval.
