Disappointment and drop-out rate after being allocated to control group in a smoking cessation trial
BackgroundIf a patient agrees to take part in a randomised trial it is reasonable to presume that the patient would prefer to be allocated into the intervention. This study's aim was to investigate how patients react after they have been randomised into control group.MethodsNested study within two randomised trials. Telephone interviews with a structured questionnaire. The participants were invite