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Variations in Case-Mix–Adjusted Duration of Mechanical Ventilation Among ICUs* by Andrew A. Kramer; Hayley B. Gershengorn; Hannah Wunsch; Jack E. Zimmerman is a Medicine article available to read on EtoBox.

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## Objectives: To develop a model that predicts the duration of mechanical ventilation and then to use this model to compare observed versus expected duration of mechanical ventilation across ICUs. ## Design: Retrospective cohort analysis. ## Setting: Eighty-six eligible ICUs at 48 U.S. hospitals. ## Patients: ICU patients receiving mechanical ventilation on day 1 (__n__ = 56,336) admitted from January 2013 to September 2014. ## Interventions: None. ## Measurements and Main Results: We developed and validated a multivariable logistic regression model for predicting duration of mechanical ventilation using ICU day 1 patient characteristics. Mean observed minus expected duration of mechanical ventilation was then obtained across patients and for each ICU. The accuracy of the model was assessed using __R__ ^2^. We defined better performing units as ICUs that had an observed minus expected duration of mechanical ventilation less than –0.5 days and a __p__ value of less than 0.01; and poorer performing units as ICUs with an observed minus expected duration of mechanical ventilation greater than +0.5 days and a __p__ value of less than 0.01. The factors accounting for the majority of the

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Author

Andrew A. Kramer; Hayley B. Gershengorn; Hannah Wunsch; Jack E. Zimmerman

Publisher

Ovid Technologies (Wolters Kluwer Health)

Published

2016

Language

EN

Field

Medicine (Health Sciences)