Lung cancer rates higher among female non-smokers

From Stanford School of Medicine never-smokers get lung cancer more often than thought, with women even more at risk than men. For women, the lung cancer incidence rate in never-smokers ranged from 14.4 to 20.8 cases per 100,000 person-years. In men, it ranged from 4.8 to 13.7 incidents. The authors infer that around 8 percent of lung cancer cases in males and close to 20 percent of cases in females are among never-smokers.