Fig. 3
From: Familial risk associated with lung cancer as a second primary malignancy in first-degree relatives
Cumulative incidence of lung cancer (LCa) in the offspring generation (born from 1932) of Swedish Cancer Register with a family history of LCa-1 or LCa-2 in father (A), mother (B), brother (C) and sister (D). A total of 71,873 individuals had father, 41,915 had mother, 7,032 had one brother and 7,045 had one sister diagnosed with LCa-1. For LCa-2, the corresponding numbers were 8,309 (father), 5,609 (mother), 711 (brother) and 861 (sister). The shading band is the 95% confidence interval of the cumulative incidence. LCa-1, lung cancer as a first primary malignancy, LCa-2, lung cancer as a second primary malignancy