Randomised controlled trial of the impact of guidelines, prioritized review criteria and feedback on implementation of recommendations for angina and asthma.

BACKGROUND

Guidelines are frequently used in an attempt to influence the performance of health professionals, and a national agency has been established in England and Wales to develop and disseminate guidelines. Professionals prefer short guidelines that highlight key recommendations, but whether such guidelines are more likely to be implemented is unknown.

AIM

To determine the relative impact of the dissemination of full guidelines, reduced guidelines in the form of prioritized review criteria, and review criteria supplemented by feedback.

DESIGN OF STUDY

Cluster randomised controlled trial, with an incomplete block design.

SETTING

Eighty-one general practices in Leicestershire, Lincolnshire, Northamptonshire, North Derbyshire, and Nottinghamshire.

METHOD

The practices received one of the study interventions, either for care of adults with asthma or for care of people with angina. Data were collected before and after the interventions, the process measures being adherence to ten recommendations about asthma and 14 about angina, and outcome measures being scores in response to an asthma symptom questionnaire or the Seattle Angina Questionnaire, and levels of patient satisfaction.

RESULTS

There were no consistent differences between the interventions in stimulating improvements in performance as indicated by adherence to the recommendations for asthma or angina. Patients with angina in practices that had received criteria or criteria plus feedback reported better symptom control.

CONCLUSION

The dissemination of guidelines in the format of prioritized review criteria does not increase adherence to recommendations in comparison with the traditional guideline format, and the further provision of feedback has minimal additional effect.