Adopting RCA²: The Interrater Reliability of Safety Assessment Codes

Safety assessment codes (SACs) are one method to evaluate adverse events and determine the need for a root cause analysis. Few facilities currently use SACs, and there is no literature examining their interrater reliability. Two independent raters assigned frequency, actual harm, and potential harm ratings to a sample of patient safety reports. An actual and potential SAC were determined. Percent agreement and Cohen's κ were calculated. Substantial agreement existed for the actual SAC (κ = 0.626, P < .001), fair agreement for the potential SAC (κ = 0.266, P < .001), and low agreement for potential harm (κ = 0.171, P = .002). Although there is subjectivity in all aspects of assigning SACs, the greatest is in potential severity. This presents a problem when using the potential SAC and is in agreement with previous literature showing significant subjectivity in determining potential harm. An operational framework is needed to strengthen reliability.