Genetic testing for susceptibility to breast and ovarian cancer: evaluating the impact of a direct-to-consumer marketing campaign on physicians' knowledge and practices.
OBJECTIVE
To assess the impact of direct-to-consumer marketing of genetic testing for risk of breast and ovarian cancer by a biotechnology company on: 1) physicians' knowledge; 2) reasons given when asking questions about the test; and 3) physicians' practice patterns in two pilot cities where the campaign took place and two control cities.


METHODS
Survey of randomly selected family physicians, internists, obstetrician-gynecologists, and oncologists from May 1-May 21, 2003.


RESULTS
Physicians' knowledge did not differ between pilot and control cities. Significant differences (pilot versus control cities) were seen in the reasons patients gave for asking questions about testing. More physicians in pilot cities (14%) than control cities (7%) reported an increase in the number of times they ordered genetic testing for breast and ovarian cancer risk in the previous 6 months (adjusted odds ratio 1.9, 95% confidence interval, 1.2-3.1). Awareness of professional guidelines and being in a practice with a policy on genetic testing for risk of breast and ovarian cancer were associated with physicians' behaviors and interest among patients in testing.


CONCLUSIONS
Given the complexity and limitations of genetic testing for risk of breast and ovarian cancer, the development and broad dissemination of clinical guidelines and education of physicians are needed.
Myers
Melanie F
MF
Office of Genomics and Disease Prevention, Centers for Disease Control and Prevention, Atlanta, GA, USA.
Chang
Man-Huei
MH
Jorgensen
Cynthia
C
Whitworth
William
W
Kassim
Sidibe
S
Litch
James A
JA
Armstrong
Lori
L
Bernhardt
Barbara
B
Faucett
W Andrew
WA
Irwin
Debra
D
Mouchawar
Judy
J
Bradley
Linda A
LA
D001943:Breast Neoplasms / Q000175:diagnosis* / Q000235:genetics; D005260:Female; D005820:Genetic Testing; D019981:Health Care Sector; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D008297:Male; D010051:Ovarian Neoplasms / Q000175:diagnosis* / Q000235:genetics; D010820:Physicians; D010821:Physicians, Family; D017410:Practice Guidelines as Topic; D012306:Risk; D011795:Surveys and Questionnaires