Convergent Validity and Interrater Reliability of Estimating the ABCD2 Score From Medical Records

Background and Purpose—The ABCD² score is increasingly used for risk stratification of transient ischemic attack patients. We sought to determine the reliability and convergent validity of retrospective ABCD² score estimation from medical records.

Methods—We compared ABCD² scores that were prospectively determined by a vascular neurology attending to scores determined retrospectively from medical record review. Emergency department records and neurology consult notes for patients with acute transient ischemic attack were abstracted with explicit ABCD² scoring redacted. Scores were estimated by 2 independent raters using these records. Estimated ABCD²component scores, total scores, and risk category were compared both between retrospective raters and with prospectively obtained scores. Reliability was assessed using unweighted κ statistics. Read more