• Critical care medicine · Jun 2018

    Impact of Preadmission Opioid Treatment on 1-Year Mortality Following Nonsurgical Intensive Care.

    • Troels Munch, Christian Fynbo Christiansen, Lars Pedersen, and Henrik Toft Sørensen.
    • Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark.
    • Crit. Care Med. 2018 Jun 1; 46 (6): 860-868.

    ObjectivesCompare all-cause mortality following nonsurgical ICU admission for opioid users with nonusers.DesignNationwide register-based cohort study.SettingAll 43 ICUs in Denmark (7,028,668 citizens cumulatively during the study period). The Danish National Health Service provides universal healthcare, guaranteeing equal access to healthcare along with partial reimbursement for prescribed drugs.PatientsAll 118,388 nonsurgical patients admitted to an ICU from 2005 to 2014.InterventionPatients were categorized according to timing of last redeemed opioid prescription before admission: current user (prior 0-30 d), recent user (prior 31-365 d), former user (prior 365+ d), or nonuser (no prescription since 1994).MeasurementsAll-cause mortality 0-30 days and 31-365 days following ICU admission was calculated using the Kaplan-Meier method. Crude and adjusted hazard ratios with 95% CIs were computed using Cox regression, comparing users with nonusers. Adjusted models included age, gender, socioeconomic factors, comedications, and comorbidity.Main ResultsFifteen percent of the patients were current opioid users, 15% recent users, 30% former users, and 40% nonusers. Zero- to 30-day mortality was 35% for current users, 29% for recent users, 24% for former users, and 21% for nonusers. After confounder adjustment, current users remained at elevated risk during the first 30 days following ICU admission (hazard ratio, 1.20; 95% CI, 1.15-1.24). No association remained for recent or former users. A similar pattern was evident for 31-365-day all-cause mortality: 24% for current users, 19% for recent users, 13% for former users, and 10% for nonusers. During 31-365 days of follow-up, both current users and recent users remained at elevated risk of mortality after adjustment (hazard ratio, 1.47; 95% CI, 1.39-1.55 and hazard ratio, 1.20; 95% CI, 1.13-1.27, respectively).ConclusionsCurrent opioid users experience increased mortality during the first year following ICU admission.

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