title: Physician use of genetic testing for cancer susceptibility: results of a national survey.
abstract: Genetic testing for inherited germ-line mutations associated with cancer susceptibility is an emerging technology in medical practice. Limited information is currently available about physician use of cancer susceptibility tests (CSTs). In 1999-2000, a nationally representative survey was conducted to estimate prevalence of CST use by United States physicians and assess demographic, training, practice setting, and practice patterns associated with use. A stratified random sample of clinicians in eight specialties was selected from a file of all licensed physicians. In total, 1251 physicians, including 820 in primary care and 431 in tertiary care, responded to a 15-min questionnaire by mail, telephone, fax, or Internet (response rate = 71.0%). In the previous 12 months, 31.2% [95% confidence interval (CI), 28.5-33.9] overall, including 30.6% (95% CI, 27.5-33.7) in primary care and 33.4% (95% CI, 27.9-38.9) in tertiary care, had ordered CSTs or referred patients elsewhere for risk assessment or testing. More physicians referred patients elsewhere [26.7% (95% CI, 24.2-29.2)] than directly ordered tests [7.9% (95% CI, 6.3-9.5)]. Factors associated with ordering or referring included practice location in the Northeast [odds ratio (OR), 2.30; 95% CI, 1.46-3.63%], feeling qualified to recommend CSTs (OR, 1.96; 95% CI = 1.41-2.72), receiving CST advertising materials (OR, 1.97; 95% CI, 1.40-2.78%), and most notably, having patients who asked whether they can or should get tested (OR, 5.52; 95% CI, 3.97-7.67%). Lower CST use was associated with not knowing if there were local testing and counseling facilities (OR, 0.39; 95% CI, 0.23-0.66%). These findings underscore the importance of establishing effective clinical approaches to test use and promoting physician education to facilitate communication with patients about cancer genetics.
authors.affiliation: National Cancer Institute, Division of Cancer Control and Population Sciences, Bethesda, Maryland 20892-7344, USA. wideroff@nih.gov
authors.forename: Louise
authors.initials: L
authors.lastname: Wideroff
authors.forename: Andrew N
authors.initials: AN
authors.lastname: Freedman
authors.forename: Lorayn
authors.initials: L
authors.lastname: Olson
authors.forename: Carrie N
authors.initials: CN
authors.lastname: Klabunde
authors.forename: William
authors.initials: W
authors.lastname: Davis
authors.forename: Kadaba P
authors.initials: KP
authors.lastname: Srinath
authors.forename: Robert T
authors.initials: RT
authors.lastname: Croyle
authors.forename: Rachel
authors.initials: R
authors.lastname: Ballard-Barbash
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005817:Genetic Counseling / Q000706:statistics & numerical data; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D005820:Genetic Testing / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D008511:Medicine / Q000706:statistics & numerical data; D008875:Middle Aged; D015999:Multivariate Analysis; D009369:Neoplasms / Q000175:diagnosis* / Q000235:genetics*; D010820:Physicians / Q000706:statistics & numerical data; D010818:Practice Patterns, Physicians' / Q000706:statistics & numerical data; D015995:Prevalence; D011365:Professional Practice Location / Q000706:statistics & numerical data; D018570:Risk Assessment / Q000706:statistics & numerical data; D013038:Specialization; D011795:Surveys and Questionnaires; D014481:United States / Q000453:epidemiology