Objectives. This study was conducted to assess the impact of an intera
ctive seminar based on self-regulation theory on 1) the treatment prac
tices and communications and education behavior of physicians, 2) the
health status and medical care utilization of their pediatric patients
with asthma, and 3) the satisfaction with care of the subjects' paren
ts. Methods. A total of 74 general practice pediatricians were assigne
d to either a program or a control group in a randomized controlled st
udy. Data were collected from physicians at baseline, and 69 (93%) pro
vided follow-up data 5 months after the program. Data were also collec
ted from 637 of their patients at baseline, and in a 22-month window a
fter the intervention, 472 (74%) of this number provided follow-up dat
a. Results. After the seminar, physicians in the program group were mo
re likely than were control group physicians to address patients' fear
s about medicines, review written instructions, provide a sequence of
educational messages, write down how to adjust the medicines at home w
hen symptoms change, and report that they spent less time with their p
atients. Parents of the children treated by program physicians were si
gnificantly more likely than were control group parents to report that
the physician had been reassuring, described as a goal that the child
be fully active, and gave information to relieve specific worries. Af
ter a visit with the physician, these parents were also more likely to
report that they knew how to make management decisions at home. After
the intervention compared to controls, patients of physicians in the
program group were more likely to have received a prescription for inh
aled antiinflammatory medicine and to have been asked by the physician
to demonstrate how to use a metered-dose inhaler. After the intervent
ion, children seen by program physicians made significantly fewer none
mergency office visits and visits for follow-up of an episode of sympt
oms; however, there were no differences in emergency department visits
and hospitalizations. Among children who were placed on inhaled corti
costeroids during this study, however, children treated by physicians
who had received education had significantly fewer symptoms and fewer
follow-up office visits, nonemergency physician office visits, emergen
cy department visits, and hospitalizations. Conclusions. The interacti
ve seminar based on theories of self-regulation led to patient-physici
an encounters that were of shorter duration, had significant impact on
the prescribing and communications behavior of physicians, led to mor
e favorable patient responses to physicians' actions, and led to reduc
tions in health care utilization.