Objective
Among older persons, disability and functional decline are associated with increased mortality, institutionalization, and costs. To determine whether illnesses and injuries leading to an emergency department (ED) visit but not hospitalization are associated with functional decline among community-living older persons.
Methods
From a cohort of 754 community-living older persons who have been followed with monthly interviews for up to 14 years, we matched 813 ED visits without hospitalization (ED-only) to 813 observations without an ED visit or hospitalization (control). We compared the course of disability over the following 6 months between the 2 matched groups. To establish a frame of reference, we also compared the ED-only group with an unmatched group who were hospitalized after an ED visit (ED-hospitalized). Disability scores (range: 0 [lowest] to 13 [highest]) were compared using generalized linear models adjusted for relevant covariates. Admission to a nursing home and mortality were evaluated as secondary outcomes.
Results
The ED-only and control groups were well matched. For both groups, the mean age was 83.6 years, and 69% were female. The baseline disability scores were 3.4 and 3.6 in the ED-only and control group, respectively. Over the 6-month follow-up period, the ED-only group had significantly higher disability scores than the control group, with an adjusted risk ratio (RR) of 1.14 (95%CI, 1.09–1.19). Compared with participants in the ED-only group, those who were hospitalized after an ED visit had disability scores that were significantly higher (RR 1.17, 95%CI, 1.12–1.22). Both nursing home admissions (HR 3.11, 95%CI, 2.05–4.72) and mortality (HR 1.93, 95%CI 1.07–3.49) were also higher in the ED-only group versus control group over the 6-month follow-up period.
Conclusions
Although not as debilitating as an acute hospitalization, illnesses and injuries leading to an ED visit without hospitalization were associated with a clinically meaningful decline in functional status over the following 6 months, suggesting that the period after an ED visit represents a vulnerable time for community-living older persons.