ScienceDaily (Jan. 22, 2010) — People diagnosed with early stage lung cancer can double their chances of survival over five years if they stop smoking compared with those who continue to smoke, finds a study published online in the British Medical Journal.
They found that people who continued to smoke after a diagnosis of early stage lung cancer had a substantially higher risk of death and a greater risk of the tumour returning compared with those who stopped smoking at that time. Data suggested that most of the increased risk of death was due to cancer progression.
Further analysis found a five year survival rate of 63-70% among quitters compared with 29-33% among those who continued to smoke. In other words, about twice as many quitters would survive for five years compared with continuing smokers.