Patients\u27 Anxiety and Expectations: How They Influence Family Physicians\u27 Decisions to Order Cancer Screening Tests

Abstract

OBJECTIVE: To compare the infl uence of physicians\u27 recommendations and patients\u27 anxiety or expectations on the decision to order four cancer screening tests in clinical situations where guidelines were equivocal: screening for prostate cancer with prostate-specific antigen for men older than 50; breast cancer screening with mammography for women 40 to 49; colorectal cancer screening with fecal occult blood testing; and colorectal cancer screening with colonoscopy for patients older than 40. DESIGN: Cross-sectional mailed survey with clinical vignettes. SETTING: British Columbia, Alberta, Ontario, Quebec, and Prince Edward Island. PARTICIPANTS: Of 600 randomly selected family physicians in active practice approached, 351 responded, but 35 respondents were ineligible (response rate 62%). MAIN OUTCOME MEASURES: Decisions to order cancer screening tests, physicians\u27 perceptions of recommendations, patients\u27 anxiety about cancer, and patients\u27 expectation to be tested. RESULTS: For all screening situations, physicians most likely to order the tests believed that routine screening with the test was recommended; physicians least likely to order tests believed routine screening was not. Patients\u27 expectations or anxiety, however, markedly increased screening by physicians who did not believe that routine screening was recommended. In regression models, the interaction between physicians\u27 recommendations and patients\u27 anxiety or expectation was significant for all four screening tests. When patients had no anxiety or expectations, physicians\u27 beliefs about screening strongly predicted test ordering. Physicians who believed routine screening was recommended ordered the test in most cases regardless of patient characteristics. But patients\u27 anxiety or expectations markedly increased the probability that the test would be ordered. The probability of test ordering went from 0.28 to 0.54 for prostate-specific antigen (odds ratio [OR] = 1.9), from 0.15 to 0.44 for mammography (OR = 2.8), from 0.33 to 0.79 for fecal occult blood testing (OR = 2.4), and from 0.29 to 0.65 for colonoscopy (OR = 2.2). CONCLUSION: Differences in clinical judgment about recommended practice lead to practice variation, but physicians are also influenced by nonmedical factors, such as patients\u27 anxiety and expectations of receiving tests. In terms of magnitude of influence, clinical judgment is more powerful than nonmedical patient factors, but patient factors are also powerful drivers of family physicians\u27 decisions about cancer screening when practice guidelines are equivocal