Triggering anti-smoking advice by GPs: mode of action of an intervention stimulating smoking cessation advice by GPs.

OBJECTIVE: To assess the mode of action of an intervention (GP desktop resource, GDR) that increased the frequency of general practitioner (GP) advice to stop smoking.

METHODS: Analyses were undertaken to differentiate between three hypotheses regarding the mode of action of the GDR. That the GDR acts: (1) by altering GPs' attitudes, (2) independently of attitudes in prompting GPs to intervene with smokers or (3) by altering the relationship between attitudes and behaviour.

RESULTS: The GDR was an independent predictor of the number of patients advised to stop smoking (beta = .345, p < .001). Concern about the doctor-patient relationship was the only attitude variable that independently predicted advice giving, in this case negatively (beta = -.465, p < .001). Possession of the GDR did not alter GPs' views on whether intervening with smokers harmed the doctor-patient relationship, but did weaken the relationship between this attitude item and the number of patients advised to stop smoking (beta = .595, p < .001 for the interaction).

CONCLUSION: This study is the first to show that concern over the doctor-patient relationship was an independent predictor of advice giving while in other studies it has merely been noted as something that GPs express concern about. A simple device designed to trigger action on the part of GPs appeared to work by mitigating the negative effect of an attitudinal barrier to action. It would be interesting to explore this phenomenon more generally in relation to health promotion activities on the part of health professionals.

PRACTICE IMPLICATIONS: Recommendations that GPs engage in health promotion activities with their patients need to consider that GPs' concerns over harming the doctor-patient relationship may deter them from making such interventions. The GDR appears to be effective in prompting GPs to advise their smoking patients to stop and its widespread distribution to GPs should be considered.