TY - JOUR
T1 - Risk factors for persistent cognitive impairment after critical illness, nested case-control study
AU - Sakusic, Amra
AU - Gajic, Ognjen
AU - Singh, Tarun D.
AU - O'Horo, John C.
AU - Jenkins, Gregory
AU - Wilson, Gregory A.
AU - Petersen, Ronald
AU - Fryer, John D.
AU - Kashyap, Rahul
AU - Rabinstein, Alejandro A.
N1 - Publisher Copyright:
© 2018 by the Society of Critical Care Medicine and Wolters Kluwer Health, Inc. All Rights Reserved.
PY - 2018
Y1 - 2018
N2 - Objectives: Persistent cognitive impairment after critical illness is an important healthcare problem forecasted to worsen in the near future. However, the epidemiology is insufficiently explored. We aimed to determine potentially modifiable risk factors during ICU hospitalization that play a significant role in developing persistent cognitive impairment. Design: An observational case-control study. Patients: We conducted a study nested in a large cohort of 98,227 adult critically ill patients. Using previously validated computable phenotypes for dementia and cognitive impairment, we determined the onset of cognitive impairment relative to ICU hospitalization and associated risk factors. The primary endpoint of the study was new and persistent cognitive impairment documented between 3 and 24 months after ICU discharge. Interventions: Unadjusted and adjusted analyses were performed to identify potentially modifiable risk factors during ICU hospitalization. Measurements and Main Results: Among 21,923 unique patients identified as cognitively impaired (22% of the entire ICU cohort), 2,428 (2.5%) developed incident new and persistent cognitive dysfunction after the index ICU admission. Compared with age- and sex-matched ICU controls (2,401 pairs), cases had higher chronic illness burden (Charlson Comorbidity Index, 6.2 vs 5.1; p < 0.01), and were more likely to have multiple ICU stays (22% vs 14%; p < 0.01). After adjustment for baseline differences, new and persistent cognitive dysfunction was associated with higher frequency of acute brain failure in the ICU, a higher exposure to severe hypotension, hypoxemia, hyperthermia, fluctuations in serum glucose, and treatment with quinolones or vancomycin. Association with sepsis observed in univariate analysis did not persist after adjustment. Conclusions: Cognitive dysfunction is highly prevalent in ICU patients. Incident new and persistent cognitive impairment is less common but important, potentially preventable problem after critical illness. Chronic comorbidities and number of ICU stays increase the risk of post-ICU cognitive dysfunction irrespective of age. Modifiable ICU exposures were identified as potential targets for future prevention trials.
AB - Objectives: Persistent cognitive impairment after critical illness is an important healthcare problem forecasted to worsen in the near future. However, the epidemiology is insufficiently explored. We aimed to determine potentially modifiable risk factors during ICU hospitalization that play a significant role in developing persistent cognitive impairment. Design: An observational case-control study. Patients: We conducted a study nested in a large cohort of 98,227 adult critically ill patients. Using previously validated computable phenotypes for dementia and cognitive impairment, we determined the onset of cognitive impairment relative to ICU hospitalization and associated risk factors. The primary endpoint of the study was new and persistent cognitive impairment documented between 3 and 24 months after ICU discharge. Interventions: Unadjusted and adjusted analyses were performed to identify potentially modifiable risk factors during ICU hospitalization. Measurements and Main Results: Among 21,923 unique patients identified as cognitively impaired (22% of the entire ICU cohort), 2,428 (2.5%) developed incident new and persistent cognitive dysfunction after the index ICU admission. Compared with age- and sex-matched ICU controls (2,401 pairs), cases had higher chronic illness burden (Charlson Comorbidity Index, 6.2 vs 5.1; p < 0.01), and were more likely to have multiple ICU stays (22% vs 14%; p < 0.01). After adjustment for baseline differences, new and persistent cognitive dysfunction was associated with higher frequency of acute brain failure in the ICU, a higher exposure to severe hypotension, hypoxemia, hyperthermia, fluctuations in serum glucose, and treatment with quinolones or vancomycin. Association with sepsis observed in univariate analysis did not persist after adjustment. Conclusions: Cognitive dysfunction is highly prevalent in ICU patients. Incident new and persistent cognitive impairment is less common but important, potentially preventable problem after critical illness. Chronic comorbidities and number of ICU stays increase the risk of post-ICU cognitive dysfunction irrespective of age. Modifiable ICU exposures were identified as potential targets for future prevention trials.
KW - Acute brain failure
KW - Cognitive impairment
KW - Comorbidities
KW - Exposures
KW - Intensive care unit
KW - Potentially modifiable risk factors
UR - http://www.scopus.com/inward/record.url?scp=85056573649&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85056573649&partnerID=8YFLogxK
U2 - 10.1097/CCM.0000000000003395
DO - 10.1097/CCM.0000000000003395
M3 - Article
C2 - 30222636
AN - SCOPUS:85056573649
SN - 0090-3493
VL - 46
SP - 1977
EP - 1984
JO - Critical care medicine
JF - Critical care medicine
IS - 12
ER -