Intensive care unit admission has minimal impact on long-term mortality

Intensive care unit admission has minimal impact on long-term mortality

Keenan SP; Dodek P; Chan K; Hogg RS; Craib KJ; Anis AH; Spinelli JJ

Critical Care Medicine

2002

Female; Humans; Male; Survival Rate; Adult; Hospital Mortality; Aged; Middle Aged; Outcome Assessment (Health Care); Survival Analysis; Analysis of Variance; Risk; Regression Analysis; Non-U.S. Gov't; Research Support; Comparative Study; retrospective studies; Intensive Care Units/utilization; British Columbia/epidemiology; Risk Adjustment

OBJECTIVE: To measure the association between intensive care unit (ICU) admission and both hospital and long-term mortality, separate from the effect of hospital admission alone. DESIGN: Retrospective cohort study. SETTING: All hospitals in British Columbia, Canada, during 3 fiscal years, 1994 to 1996. PATIENTS: A total of 27,103 patients admitted to ICU and 41,308 (5% random sample) patients admitted to hospital but not to ICU. INTERVENTION: None. MEASUREMENTS AND MAIN RESULTS: Although ICU admission was an important factor associated with hospital mortality (odds ratio: 9.12; 95% confidence interval: 8.34-9.96), the association between ICU admission and mortality after discharge was relatively minimal (hazard ratio: 1.21; 95% confidence interval: 1.17-1.27) and was completely overshadowed by the effect of age, gender, and diagnosis. CONCLUSIONS: After controlling for the effect of hospital admission, admission to ICU has minimal independent effect on mortality after discharge.

2002

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