Promoting Patient-Centered Counseling to Reduce Use of Low-Value Diagnostic Tests: A Randomized Clinical Trial.

IMPORTANCE: Low-value diagnostic tests have been included on primary care specialty societies' "Choosing Wisely" Top Five lists.

OBJECTIVE: To evaluate the effectiveness of a standardized patient (SP)-based intervention designed to enhance primary care physician (PCP) patient-centeredness and skill in handling patient requests for low-value diagnostic tests.

DESIGN, SETTING, AND PARTICIPANTS: Randomized clinical trial of 61 general internal medicine or family medicine residents at 2 residency-affiliated primary care clinics at an academic medical center in California.

INTERVENTIONS: Two simulated visits with SP instructors portraying patients requesting inappropriate spinal magnetic resonance imaging for low back pain or screening dual-energy x-ray absorptiometry. The SP instructors provided personalized feedback to residents regarding use of 6 patient-centered techniques to address patient concerns without ordering low-value tests. Control group physicians received SP visits without feedback and were emailed relevant clinical guidelines.

MAIN OUTCOMES AND MEASURES: The primary outcome was whether resident PCPs ordered SP-requested low-value tests during up to 3 unannounced SP clinic visits over 3 to 12 months follow-up, with patients requesting spinal magnetic resonance imaging, screening dual-energy x-ray absorptiometry, or headache neuroimaging. Secondary outcomes included PCP patient-centeredness and use of targeted techniques (both coded from visit audiorecordings), and SP satisfaction with the visit (0-10 scale).

RESULTS: Of 61 randomized resident PCPs (31 control group and 30 intervention group), 59 had encounters with 155 SPs during follow-up. Compared with control PCPs, intervention PCPs had similar patient-centeredness (Measure of Patient-Centered Communication, 43.9 [95% CI, 42.0 to 45.7] vs 43.7 [95% CI, 41.8 to 45.6], adjusted mean difference, -0.2 [95% CI, -2.9 to 2.5]; P = .90) and used a similar number of targeted techniques (5.4 [95% CI, 4.9 to 5.8] vs 5.4 [95% CI, 4.9 to 5.8] on a 0-9 scale, adjusted mean difference, 0 [95% CI, -0.7 to 0.6]; P = .96). Residents ordered low-value tests in 41 SP encounters (26.5% [95% CI, 19.7%-34.1%]) with no significant difference in the odds of test ordering in intervention PCPs relative to control group PCPs (adjusted odds ratio, 1.07 [95% CI, 0.49-2.32]). Rates of test ordering among intervention and control PCPs were similar for all 3 SP cases. The SPs rated visit satisfaction higher among intervention than control PCPs (8.5 [95% CI, 8.1-8.8] vs 7.8 [95% CI, 7.5-8.2], adjusted mean difference, 0.6 [95% CI, 0.1-1.1]).

CONCLUSIONS AND RELEVANCE: An SP-based intervention did not improve the patient-centeredness of SP encounters, use of targeted interactional techniques, or rates of low-value test ordering, although SPs were more satisfied with intervention than control residents.

TRIAL REGISTRATION: clinicaltrials.gov Identifier: NCT01808664.