A nomogram for predicting the risk of synchronous lung metastasis.
To test the predictive ability of the nomograms, AUC and calibration plot were generated both in the train and validation cohorts. The AUC of the nomogram was 0.76 (95% CI 0.73–0.80) for train cohort and 0.76 (95% CI 0.71–0.81) for validation cohort, respectively. And that was much higher than each variable (