Table 3.

Summary of findings from randomised control trial

Study	Participants	Intervention	Control	Method	Outcome
Frank et al 20001	Age 66 years; white 62%; heart disease 20%; 22% smokers; exercise 72%	Non-clinic physician video of diet and exercise; and has a bike helmet and apple on desk	As for intervention but no picture of helmet and apple	Concealment of randomisation not mentioned and blinding not reported	Questionnaire after visit showed video which included SD was more likely to improve healthy behaviours

SD = physician self-disclosure.