Risk of lung cancer-specific death in proband's relative (child, sibling, spouse) depending on proband survival.

aMultivariate proportional hazard (Cox) model adjusted for calendar year of diagnosis and age at diagnosis.bOne degree of freedom.cMultivariate proportional hazard (Cox) model adjusted for calendar year, age and place of diagnosis, socioeconomic status, tumour histology and gender.dParents (Spouses) diagnosed between January 1961 and December 2001.eChildren (siblings) diagnosed between January 1991 and December 2001.