Mystery over gender differences in lung cancer rates

Oestrogen could make women are more susceptible to lung cancer, speculate researchers

Lung cancer incidence is higher among young women than men in countries around the world, and smoking exposure does not explain it, researchers say.

Canadian-led researchers studied lung and bronchial cancer incidence rates in 40 countries across four continents. Data were categorised by five-year age groups from ages 30-64, and by five-year calendar periods, from 1993-2012.

As reported in the International Journal of Cancer, among men, age-specific lung cancer incidence rates generally decreased in all countries, while in

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