Immortal time bias in critical care research: application of time-varying Cox regression for observational cohort studies.
作者： Ayumi K. Shintani , Timothy D. Girard , Svetlana K. Eden , Patrick G. Arbogast , Karel G. M. Moons
DOI: 10.1097/CCM.0B013E3181B7FBBB
关键词: Observational study 、 Prospective cohort study 、 Cohort study 、 Emergency medicine 、 Research design 、 Medicine 、 Proportional hazards model 、 Intensive care medicine 、 Kaplan-Meier Estimate 、 Intensive care unit 、 Intensive care
摘要: Objectives To determine the magnitude of bias when using time-fixed methodology to analyze effect a time-varying exposure incurred in ICU on length stay.
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