|Title||Long-term cognitive impairment and functional disability among survivors of severe sepsis.|
|Publication Type||Journal Article|
|Year of Publication||2010|
|Authors||Iwashyna, TJ, E Ely, W, Smith, DM, Langa, KM|
|Date Published||2010 Oct 27|
|Keywords||Activities of Daily Living, Aged, Aged, 80 and over, Case-Control Studies, Cognition Disorders, Disabled Persons, Female, Health Status, Hospitalization, Humans, Male, Prospective Studies, Sepsis, Severity of Illness Index, Survivors, United States|
CONTEXT: Cognitive impairment and functional disability are major determinants of caregiving needs and societal health care costs. Although the incidence of severe sepsis is high and increasing, the magnitude of patients' long-term cognitive and functional limitations after sepsis is unknown.
OBJECTIVE: To determine the change in cognitive impairment and physical functioning among patients who survive severe sepsis, controlling for their presepsis functioning.
DESIGN, SETTING, AND PATIENTS: A prospective cohort involving 1194 patients with 1520 hospitalizations for severe sepsis drawn from the Health and Retirement Study, a nationally representative survey of US residents (1998-2006). A total of 9223 respondents had a baseline cognitive and functional assessment and had linked Medicare claims; 516 survived severe sepsis and 4517 survived a nonsepsis hospitalization to at least 1 follow-up survey and are included in the analysis.
MAIN OUTCOME MEASURES: Personal interviews were conducted with respondents or proxies using validated surveys to assess the presence of cognitive impairment and to determine the number of activities of daily living (ADLs) and instrumental ADLs (IADLs) for which patients needed assistance.
RESULTS: Survivors' mean age at hospitalization was 76.9 years. The prevalence of moderate to severe cognitive impairment increased 10.6 percentage points among patients who survived severe sepsis, an odds ratio (OR) of 3.34 (95% confidence interval [CI], 1.53-7.25) in multivariable regression. Likewise, a high rate of new functional limitations was seen following sepsis: in those with no limits before sepsis, a mean 1.57 new limitations (95% CI, 0.99-2.15); and for those with mild to moderate limitations before sepsis, a mean of 1.50 new limitations (95% CI, 0.87-2.12). In contrast, nonsepsis general hospitalizations were associated with no change in moderate to severe cognitive impairment (OR, 1.15; 95% CI, 0.80-1.67; P for difference vs sepsis = .01) and with the development of fewer new limitations (mean among those with no limits before hospitalization, 0.48; 95% CI, 0.39-0.57; P for difference vs sepsis <.001 and mean among those with mild to moderate limits, 0.43; 95% CI, 0.23-0.63; P for difference = .001). The declines in cognitive and physical function persisted for at least 8 years.
CONCLUSIONS: Severe sepsis in this older population was independently associated with substantial and persistent new cognitive impairment and functional disability among survivors. The magnitude of these new deficits was large, likely resulting in a pivotal downturn in patients' ability to live independently.
|User Guide Notes|
|Endnote Keywords|| |
Sepsis/Cognitive psychology/Disability/Disability/Survivor/Inpatient care
|Endnote ID|| |
|PubMed Central ID||PMC3345288|
|Grant List||P60 DK-20572 / DK / NIDDK NIH HHS / United States |
U01 AG009740 / AG / NIA NIH HHS / United States
R01 AG030155 / AG / NIA NIH HHS / United States
UL1RR024986 / RR / NCRR NIH HHS / United States
K08 HL091249-03 / HL / NHLBI NIH HHS / United States
U01 AG09740 / AG / NIA NIH HHS / United States
P60 DK020572 / DK / NIDDK NIH HHS / United States
R01 AG027010 / AG / NIA NIH HHS / United States
AG027472 / AG / NIA NIH HHS / United States
K08 HL091249 / HL / NHLBI NIH HHS / United States
K08 HL091249-02 / HL / NHLBI NIH HHS / United States
K23 AG001023 / AG / NIA NIH HHS / United States
UL1 RR024986 / RR / NCRR NIH HHS / United States