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Multivariate Cox proportional hazard models of patients meeting USPSTF screening criteria vs. long-term quitter. Results were presented in (A) the hospital cohort and (B) the community cohort, including unmatched and matched analyses for age at diagnosis and pack-years. Multivariate Cox proportional hazard models were used to adjust for age, sex, race, smoking status, pack-years smoked, tumor histology and stage, and treatment modalities.
