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Multivariable conditional stepwise logistic regression analyses on the association of potential determinants of admission to critical care following emergency department presentation due to acute recreational drug toxicity compared to medical discharge from the emergency department. Abbreviations: ED, Emergency Department; GHB/GBL, gamma-hydroxybutyrate/gamma-butyrolactone; MDMA, 3,4-methylenedioxymethamphetamine; aOR, adjusted odds ratio; CI, confidence interval.
