Former smoking, but not active smoking, is associated with delirium in postoperative ICU patients: a matched case-control study

Komninou, Maria Angeliki; Egli, Simon; Rossi, Aurelio; Ernst, Jutta; Krauthammer, Michael; Schuepbach, Reto A; Delgado, Marcos; Bartussek, Jan

doi:10.3389/fpsyt.2024.1347071

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Komninou, M. A., Egli, S., Rossi, A., Ernst, J., Krauthammer, M., Schuepbach, R. A., Delgado, M., & Bartussek, J. (2024). Former smoking, but not active smoking, is associated with delirium in postoperative ICU patients: a matched case-control study. Frontiers in Psychiatry, 15, 1347071. https://doi.org/10.3389/fpsyt.2024.1347071

Abstract

Objective: To examine the relationship between current and former smoking and the occurrence of delirium in surgical Intensive Care Unit (ICU) patients. Methods: We conducted a single center, case-control study involving 244 delirious and 251 non-delirious patients that were admitted to our ICU between 2018 and 2022. Using propensity score analysis, we obtained 115 pairs of delirious and non-delirious patients matched for age and Simplified Acute Physiology Score II (SAPS II). Both groups of patients were further stratified into non-s