• Jitender Sareen, Kendiss Olafson, Maia S Kredentser, O Joseph Bienvenu, Marcus Blouw, James M Bolton, Sarvesh Logsetty, Dan Chateau, Yao Nie, Charles N Bernstein, Tracie O Afifi, Murray B Stein, William D Leslie, Laurence Y Katz, Natalie Mota, Renée El-Gabalawy, Sophia Sweatman, and Ruth Ann Marrie.
• Department of Psychiatry, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada.
• Crit. Care Med. 2020 Aug 1; 48 (8): e675e683e675-e683.

ObjectiveTo estimate incidence of newly diagnosed mental disorders among ICU patients.DesignRetrospective-matched cohort study using a population-based administrative database.SettingManitoba, Canada.ParticipantsA total of 49,439 ICU patients admitted between 2000 and 2012 were compared with two control groups (hospitalized: n = 146,968 and general population: n = 141,937), matched on age (± 2 yr), sex, region of residence, and hospitalization year.InterventionNone.Measurements And Main ResultsIncident mental disorders (mood, anxiety, substance use, personality, posttraumatic stress disorder, schizophrenia, and psychotic disorders) not diagnosed during the 5-year period before the index ICU or hospital admission date (including matched general population group), but diagnosed during the subsequent 5-year period. Multivariable survival models adjusted for sociodemographic variables, Charlson comorbidity index, admission diagnostic category, and number of ICU and non-ICU exposures. ICU cohort had a 14.5% (95% CI, 14.0-15.0) and 42.7% (95% CI, 42.0-43.5) age- and sex-standardized incidence of any diagnosed mental disorder at 1 and 5 years post-ICU exposure, respectively. In multivariable analysis, ICU cohort had increased risk of any diagnosed mental disorder at all time points versus the hospitalized cohort (year 5: adjusted hazard ratio, 2.00; 95% CI, 1.80-2.23) and the general population cohort (year 5: adjusted hazard ratio, 3.52; 95% CI, 3.23-3.83). A newly diagnosed mental disorder was associated with younger age, female sex, more recent admitting years, presence of preexisting comorbidities, and repeat ICU admission.ConclusionsICU admission is associated with an increased incidence of mood, anxiety, substance use, and personality disorders over a 5-year period.

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