Cohort study


In 1951, Richard Doll and Austin Bradford-Hill initiated a groundbreaking research endeavor by contacting all registered doctors in the UK to inquire about their smoking habits. The British Doctors Study enrolled and tracked more than 40,000 participants, monitoring mortality rates and causes of death in the subsequent years and decades. Even with the release of the initial set of preliminary findings in 1954, there was already evidence linking smoking to lung cancer and increased mortality. As time went on, the study yielded further conclusive evidence regarding the health risks associated with smoking. Additionally, it expanded its scope to investigate other [...]