Isolating red flags to enhance diagnosis (I-RED): An experimental vignette study. (28th October 2019)

• Record Type: Journal Article
• Authors: Chartan, Corey; Singh, Hardeep; Krishnamurthy, Parthasarathy; Sur, Moushumi; Meyer, Ashley; Lutfi, Riad; Stark, Julie; Thammasitboon, Satid
• Is Part Of: International journal for quality in health care. Volume 31:Number 8(2019)
• Page Start: G97
• Page End: G102
• Publication Date: 2019-10-28
• Subjects: diagnostic error -- diagnostic accuracy -- case complexity -- system two -- cognitive load -- patient safety; Medical care -- Quality control -- Periodicals; 362.1068
• DOI: 10.1093/intqhc/mzz082
• Languages: English
• ISSNs: 1353-4505

Abstract

Abstract: Objective: To investigate effects of a cognitive intervention based on isolation of red flags (I-RED) on diagnostic accuracy of 'do-not-miss diagnoses.' Design: A 2 × 2 randomized case vignette-based experiment with manipulation of I-RED strategy between subjects and case complexity within subjects. Setting: Two university-based residency programs. Participants: One-hundred and nine pediatric residents from all levels of training. Interventions: Participants were randomly assigned to the I-RED vs. control group, and within each group, they were further randomized to the order in which they saw simple and complex cases. The I-RED strategy involved an instruction to look for a constellation of symptoms, signs, clinical data or circumstances that should heighten suspicion for a serious condition. Main Outcome Measures: Primary outcome was diagnostic accuracy, scored as 1 if any of the three differentials given by participants included the correct diagnosis, and 0 if not. We analyzed effects of I-RED strategy on diagnostic accuracy using logistic regression. Results: I-RED strategy did not yield statistically higher diagnostic accuracy compared to controls (62 vs. 48%, respectively; odd ratio = 2.07 [95% confidence interval, 0.78–5.5], P = 0.14) although participants reported higher decision confidence compared to controls (7.00 vs. 5.77 on a scale of 1 to 10, P < 0.02) in simple but not complex cases. I-RED strategy significantly shortened time to decision (460 vs. 657 s, P < 0.001) and increased the number of red flags generated (3.04 vs. 2.09, P < 0.001). Conclusions: A cognitive strategy of prompting red flag isolation prior to differential diagnosis did not improve diagnostic accuracy of 'do-not-miss diagnoses.' Given the paucity of evidence-based solutions to reduce diagnostic error and the intervention's potential effect on confidence, findings warrant additional exploration.