Risk factors

There are many different factors – and often a combination of these – why someone is at risk of developing lung cancer. Although smoking is the leading risk factor for lung cancer, up to a quarter of cases occur in people who have never smoked.

The most common risk factors are:

  • Smoking
  • Passive smoking
  • Exposure to asbestos, radon gas and other chemicals during work
  • Genetic predisposition
  • Diesel fumes
  • Poor diet
  • Sedentary lifestyle
  • Family history of lung cancer