radio and surgery type as independent prognostic factors. A nomogram was developed by these factors. The C-indexes of the model were 0.67 (95%CI, 0.64 to 0.70) in training cohort and 0.66 in validation cohort (95%CI, 0.60 to 0.72). The calibration plot showed an optimal consistent between nomogram predicted survival and actual observed survival. Different subgroups stratified by prognostic score showed significant distinctions by survival analysis. Conclusion: This study established an effective nomogram for survival outcomes prediction of stage IIIA-N2 NSCLC after surgery and stratified patients by outcomes.
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