In the international Drug Education Project, an educational program involvi
ng auditing and feedback in peer groups to improve the treatment of asthma
and urinary tract infections (UTI) was developed and tested in primary care
. Individualized feedback was provided and discussed in 24 Dutch peer group
s showing doctors their prescribing practices and underlying reasons for tr
eatment. A parallel, randomized controlled design was used to test the effe
ct on competence and actual prescribing; in one study arm doctors received
feedback on asthma treatment and in the other on UTI treatment. Especially
the messages to treat asthma exacerbations with oral corticosteroids (17% i
ncrease) and to prescribe short courses for UTI (decrease duration of 1.8 d
ays) brought about large improvements. Both messages concerned acute situat
ions, and were clear and relatively easy for GPs to implement. GPs will exp
erience more barriers when changing maintenance treatment of an asthma pati
ent, which could explain the more limited success of this part of the educa
tional program: the proportion of patients treated with inhaled corticoster
oids increased 5%. A ceiling effect was experienced regarding drug choice f
or UTI. (C) 2000 Elsevier Science Inc. All rights reserved.