Table 3.

Final models and results of 3-fold cross-validation analyses

	Baseline model	Baseline model + DRC	Baseline model + bleomycin	Baseline model + DRC + bleomycin
Former smokers
Overall AUC	0.67 (0.63–0.71)	0.69 (0.65–0.73)	0.68 (0.64–0.72)	0.70 (0.66–0.74)
Cross-validation mean AUC (95% CI)	—	—	—	0.68 (0.62–0.75)
P, goodness of fit	—	—	—	0.610
Current smokers
Overall AUC	0.68 (0.64–0.72)	0.69 (0.64–0.73)	0.72 (0.68–0.77)	0.73 (0.69–0.77)
Cross-validation mean AUC (95% CI)	—	—	—	0.70 (0.63–0.77)
P, goodness of fit	—	—	—	0.433