The aim of this survey was to estimate how prevalent dysfunctional breathing is in adults with asthma and how it is treated. The survey included a postal questionnaire survey and 7033 patients between 17-65 with diagnosed asthma who were receiving treatment. The survey found around one third of women and one fifth of men with asthma may have dysfunctional breathing. It also suggested further studies are needed to confirm the validity of this screening tool and results and that these prevalences may suggest scope for therapeutic intervention and could explain the success of the Buteyko Breathing Method in treating asthma to date. Thomas, M, McKinley, R, Freeman, E, Foy, C. (2001) BMJ. Volume 322, Number 7294. Read the Stud