Wongtangman K.Azimaraghi O.Freda J.Ganz-Lord F.Shamamian P.Bastien A.Mirhaji P.Himes C.P.Rupp S.Green-Lorenzen S.Smith R.V.Medrano E.M.Anand P.Rego S.Velji S.Eikermann M.Mahidol University2023-06-182023-06-182022-12-01Journal of Clinical Anesthesia Vol.83 (2022)09528180https://repository.li.mahidol.ac.th/handle/20.500.14594/85239Objective: Avoidable case cancellations within 24 h reduce operating room (OR) efficiency, add unnecessary costs, and may have physical and emotional consequences for patients and their families. We developed and validated a prediction tool that can be used to guide same day case cancellation reduction initiatives. Design: Retrospective hospital registry study. Setting: University-affiliated hospitals network (NY, USA). Patients: 246,612 (1/2016–6/2021) and 58,662 (7/2021–6/2022) scheduled elective procedures were included in the development and validation cohort. Measurements: Case cancellation within 24 h was defined as cancelling a surgical procedure within 24 h of the scheduled date and time. Our candidate predictors were defined a priori and included patient-, procedural-, and appointment-related factors. We created a prediction tool using backward stepwise logistic regression to predict case cancellation within 24 h. The model was subsequently recalibrated and validated in a cohort of patients who were recently scheduled for surgery. Main results: 8.6% and 8.7% scheduled procedures were cancelled within 24 h of the intended procedure in the development and validation cohort, respectively. The final weighted score contains 29 predictors. A cutoff value of 15 score points predicted a 10.3% case cancellation rate with a negative predictive value of 0.96, and a positive predictive value of 0.21. The prediction model showed good discrimination in the development and validation cohort with an area under the receiver operating characteristic curve (AUC) of 0.79 (95% confidence interval 0.79–0. 80) and an AUC of 0.73 (95% confidence interval 0.72–0.73), respectively. Conclusions: We present a validated preoperative prediction tool for case cancellation within 24 h of surgery. We utilize the instrument in our institution to identify patients with high risk of case cancellation. We describe a process for recalibration such that other institutions can also use the score to guide same day case cancellation reduction initiatives.MedicineArticleSCOPUS10.1016/j.jclinane.2022.1109872-s2.0-851404583391873452936308990