BMJ 2008;336:598-600 (published 6 March 2008)
Research
Gary Parkes, general practitioner, Trisha Greenhalgh, professor, Department of Primary Care and Population Sciences, University College London; Mark Griffin, lecturer in medical statistics, and Richard Dent, consultant chest physician department of chest medicine
Conclusion: Telling smokers their lung age significantly improves the likelihood of them quitting smoking, but the mechanism by which this intervention achieves its effect is unclear.
