b'Scientific Session Abstracts SATURDAY APRIL 20, 2024 and ASA class4. These were then used to create a 14-point risk score (Table). Patients were stratified into three groups based upon their risk score: low risk (0-4 points; n=4,966) with an NHD rate of 9.9%, moderate risk (5-6 points; n=2,442) with an NHD rate of 25.5%, and high risk ( 7 points; n=886) with an NHD rate of 44.6% (Figure). The risk score had good predictive ability with c-statistic=0.73 for model development and c-statistic=0.72 in the validation dataset. Conclusions: This novel risk score can predict NHD following elective OAR using characteristics that can be identified preoperatively. Utilization of this score may allow for improved risk assessment, preoperative counseling, and shared decision making.Figure. Patients were stratified into three groups based upon their risk score:low risk (04 points), moderate risk (56 points), and high risk ( 7 points).Table. Hierarchical Logistic Regression for Non-Home Discharge in the Model Development Group and Point Scores for Non-Home Discharge42 NDANNUAL MEETING|APRIL 1921, 2024|OCEANSIDE, CA 39'