Cancer screening, patient characteristics, and shared decision making (SDM): A complicated equation.

Abstract

164 Background: SDM may vary by patient and clinical decision. In a randomized trial of physician (MD) educational interventions to improve cancer screening guideline compliance, we studied patient (PT) and MD recall of discussions and factors that affected recall. Methods: In a cluster-randomized trial of educational supports for MDs, we are enrolling an age- (30-89 years) and sex-stratified sample of 216 PTs who underwent a physical examination at 2 urban hospitals, 18 for each of 12 primary care MDs. Screening guideline formatting (color-coding) and academic detailing were randomly assigned in a 2x2 design. Immediate post-encounter surveys recorded PT and MD recall of screening discussions. Results: The first 174 participants were diverse (63% white) and highly educated (77% college degree). PTs and MDs differed in recall of screening discussions, and the differences varied by screening test. When MDs reported a colorectal cancer (CRC) screening discussion, 21% of PTs did not; 20% of MDs disagreed when PTs reported the discussion. The discrepancies were greater for prostate specific antigen (PSA) screening, 29% and 29%, respectively, but much less for mammograms (MAM), 8% and 5%, respectively. Recall of the MD recommendation also differed: 15% of PTs disagreed when their MD reported it, and 33% of MDs when their PT reported it. For PSA, disagreement was 26% and 33%, respectively, and for MAM, disagreement was 17% and 10%, respectively. Overall, agreement between all PTs and MDs on whether screening was recommended was fair for CRC, PSA and MAM: kappa = 0.33, 0.34 and 0.29, respectively. Older PT age ( > 70) sharply eroded agreement on recalled CRC and PSA recommendations (kappa = -0.02 and -0.03, respectively) but much higher for MAM (kappa = 0.39). Recall concordance improved when elements of SDM were recalled. For CRC, kappa rose from -0.12 to 0.52 if the MD recalled any MDM element. Conclusions: In a highly educated, diverse PT population, PTs and MDs surveyed immediately after their encounter often disagreed on what had occurred in screening discussions. Disagreement was greater for CRC and PSA vs. MAM, greater for older PTs but improved when SDM was recalled. Clinical trial information: NCT02430948.