Intended for healthcare professionals

Research Article

Deception among smokers.

Br Med J 1978; 2 doi: (Published 28 October 1978) Cite this as: Br Med J 1978;2:1185
  1. R W Sillett,
  2. M B Wilson,
  3. R E Malcolm,
  4. K P Ball


    Subjects in two different clinical trials who had been advised to stop smoking were asked if they had done so. Some 22% of subjects (11 out of 51) in the first trial and 40% (33/82) in the second trial who said they had stopped smoking were found to have raised carboxyhaemoglobin concentrations. Deception appears to be common in people trying to stop smoking.