Frailty,Acute Organ Dysfunction,and Increased Disability After Hospitalization in Older Adults Who Survive Critical Illness: A Prospective Cohort Study

Abstract

Purpose:

We aimed to describe the association between prehospital frailty (PHF), acute organ dysfunction (AOD), and posthospital disability (PHD) outcome in older adults admitted to the intensive care unit (ICU).

Methods:

In a prospective observational cohort study, we assessed PHF using the Clinical Frailty Scale (CFS) and assessed the level of AOD using Sequential Organ Failure Assessment (SOFA) scores on ICU day 1. We assessed Activities of Daily Living disability levels through to 6 months after discharge and used generalized estimating equations (log link and negative binomial family) to determine the independent association of PHF and AOD with PHD.

Results:

Of the 302 patients enrolled, 221 (73.1%) survived the hospitalization. Prehospital frailty was associated with PHD (adjusted incident rate ratio [aIRR] 95% confidence interval [95% CI] per unit increase in CFS 1.38 [1.15-1.67], P = .001). Total day 1 SOFA score was weakly associated with PHD, (aIRR [95% CI] 1.05 [1.00-1.10], P = .037) while day 1 SOFA neurologic score was strongly associated with PHD (aIRR [95% CI] 1.42 [1.24-1.62] per unit increase in SOFA neurologic score, P < .001), and these effects were independent of PHF and other premorbid factors.

Conclusions:

Both PHF and early acute brain dysfunction are important factors associated with increasing PHD in older adults who survive critical illness.

Keywords

organ dysfunction frailty brain dysfunction disability intensive care unit outcomes research

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