Stuart Grant
Validation of Three Postoperative Risk Prediction Models for Intensive Care Unit Mortality after Cardiac Surgery
Grant, Stuart; Venkateswaran, Rajamiyer; Malagon, Ignacio; Goldstein, Michael; McCollum, Charles; Caiado, Camila; Howitt, Samuel
Authors
Rajamiyer Venkateswaran
Ignacio Malagon
Michael Goldstein
Charles McCollum
Professor Camila Caiado c.c.d.s.caiado@durham.ac.uk
Director of Interdisciplinary PGT
Samuel Howitt
Abstract
Background: Several cardiac surgery risk prediction models based on postoperative data have been developed. However, unlike preoperative cardiac surgery risk prediction models, postoperative models are rarely externally validated or utilized by clinicians. The objective of this study was to externally validate three postoperative risk prediction models for intensive care unit (ICU) mortality after cardiac surgery. Methods: The logistic Cardiac Surgery Scores (logCASUS), Rapid Clinical Evaluation (RACE), and Sequential Organ Failure Assessment (SOFA) scores were calculated over the first 7 postoperative days for consecutive adult cardiac surgery patients between January 2013 and May 2015. Model discrimination was assessed using receiver operating characteristic curve analyses. Calibration was assessed using the Hosmer–Lemeshow (HL) test, calibration plots, and observed to expected ratios. Recalibration of the models was performed. Results: A total of 2255 patients were included with an ICU mortality rate of 1.8%. Discrimination for all three models on each postoperative day was good with areas under the receiver operating characteristic curve of >0.8. Generally, RACE and logCASUS had better discrimination than SOFA. Calibration of the RACE score was better than logCASUS, but ratios of observed to expected mortality for both were generally <0.65. Locally recalibrated SOFA, logCASUS and RACE models all performed well. Conclusion: All three models demonstrated good discrimination for the first 7 days after cardiac surgery. After recalibration, logCASUS and RACE scores appear to be most useful for daily risk prediction after cardiac surgery. If appropriately calibrated, postoperative cardiac surgery risk prediction models have the potential to be useful tools after cardiac surgery.
Journal Article Type | Article |
---|---|
Acceptance Date | Oct 19, 2017 |
Online Publication Date | Jan 9, 2018 |
Publication Date | Jan 9, 2018 |
Deposit Date | Aug 7, 2018 |
Publicly Available Date | Mar 8, 2019 |
Journal | Thoracic and Cardiovascular Surgeon |
Print ISSN | 0171-6425 |
Electronic ISSN | 1439-1902 |
Publisher | Thieme Gruppe |
Peer Reviewed | Peer Reviewed |
Volume | 66 |
Issue | 8 |
Pages | 651-660 |
DOI | https://doi.org/10.1055/s-0037-1608897 |
Public URL | https://durham-repository.worktribe.com/output/1352780 |
Related Public URLs | https://www.research.manchester.ac.uk/portal/en/publications/validation-of-three-postoperative-risk-prediction-models-for-intensive-care-unit-mortality-after-cardiac-surgery(17364f7b-a0bc-42f5-bb9d-064ca5b7ffc6).html |
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