# British Doctors' Study

> The British Doctors' Study was a prospective cohort study which ran from 1951 to 2001, and in 1956 provided convincing statistical evidence that tobacco smoking increases risk of lung cancer.

The British Doctors' Study was a prospective cohort study which ran from <1951> to <2001>, and in <1956> provided convincing statistical evidence that tobacco <smoking> increases risk of <lung cancer>.