Journal of general internal medicine
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Randomized Controlled Trial Clinical Trial
Assessing patients' expectations in ambulatory medical practice. Does the measurement approach make a difference?
To compare three different approaches to the measurement of patients' expectations for care, we conducted a randomized controlled trial. Medical outpatients (n = 318) of a small (six-physician), single-specialty (internal medicine), academically affiliated private practice in Sacramento, California, were contacted by telephone the night before a scheduled office visit and enrolled over a 5-month period in early 1994. Patients were randomly assigned to receive: (1) a self-administered, structured, previsit questionnaire combined with a postvisit questionnaire; (2) an interviewer-administered, semistructured, previsit interview combined with a postvisit questionnaire; or (3) a postvisit questionnaire only. ⋯ In conclusion, studies of patients' expectations for care must content with a substantial "method effect." In this study from a single group practice, patients checked off more expectations using a structured questionnaire than they disclosed in a semistructured interview, but both formats predicted visit satisfaction. Asking patients about interventions received in relation to their previsit expectations added little to simply asking them directly about omitted care. The interaction of survey method with ethnicity and other sociodemographic characteristics requires further study.