https://www.selleckchem.com/pr....oducts/beta-nicotina
The C-indexes of the training and validation groups were 0.772 (95% CI 0.770-0.774) and 0.769 (95% CI 0.765-0.773), respectively, which revealed that the nomogram had sufficient credibility and stable predictive accuracy. The calibration curve displayed consistency between the actual and predictive values in both training and validation groups. The prognostic nomogram with the extent of VPI could offer an accurate risk evaluation for patients with NSCLC. Independent external validation of this research should be
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