As more women enter medicine, intriguing questions arise about how phy
sician gender impacts practice style. To measure this influence in pri
mary care encounters, 118 male and 132 female adult new patients, havi
ng no stated preference for a specific physician, were randomly assign
ed to university hospital primary care residents, and their initial en
counters were videotaped. Forty-eight male and 33 female physicians pa
rticipated. Patient health status was assessed before the visit with t
he Medical Outcomes Study Short-Form General Health Survey. Physician
practice style was evaluated by using the Davis Observation Code to an
alyze videotapes of each initial visit. Patient satisfaction with medi
cal care was assessed with satisfaction questionnaires. Contrary to pr
ior reports, the difference between male and female physicians in tota
l time spent with patients was small and statistically insignificant,
and diminished further when controlling for patient gender and health
status. Female physicians, however, were observed to engage in more pr
eventive services and to communicate differently with their patients.
These differences in practice style appear to explain partially the ob
served higher patient satisfaction scores for female physicians. This
study underscores the importance of careful measurement and control of
potential confounding factors in clarifying the impact of physician g
ender on practice style.