Figure 2. Cumulative Incidence of Lung Cancer in the National Lung Screening Trial Low-Dose Computed Tomography Group Occurring 1 to 4 Years After the Last Low-Dose Computed Tomography Screen Among 23 227 Participants^a.

Stratified by Lung CT Screening Reporting & Data System screen results (positive vs negative) at baseline, 1-year, and 2-year annual screenings categorized into 4 groups.

^aCompeting risks (ie, non–lung cancer deaths) were taken into account according to the method by Fine and Gray.²⁴ Included in the analysis were 298 incident lung cancer cases and 735 competing-cause deaths during the 3-year follow-up period.