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Cross-Continental Transfer of Perioperative Mortality Prediction: Intraoperative Features Generalize Where Preoperative Features Fail

2025-12-29 health informatics Title + abstract only
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BackgroundMachine learning models for perioperative mortality prediction show strong internal discrimination, yet external validation--particularly across continents--remains rare. Whether intraoperative vital sign features, which improve internal performance by 5-10%, transfer across populations is unknown. Furthermore, aggregate discrimination metrics may overstate clinical utility through Simpsons paradox if models separate risk strata without discriminating within them. MethodsWe conducted ...

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