# Emergency cancer diagnosis in older adults: patterns, subgroups, and implications for health-care quality metrics

## TL;DR

This study examines how older adults in the US are diagnosed with cancer in emergency settings and identifies patterns that suggest barriers to timely care.

## Contribution

The study introduces a novel classification of emergency cancer diagnoses based on hospitalization status to better understand care barriers.

## Key findings

- 38% of older cancer patients were diagnosed through emergency presentations, with 80% requiring hospitalization.
- Outpatient emergency presentations were more common in younger, rural patients with localized cancers.
- Emergency presentations had less nonemergency care for symptoms and more prediagnostic emergency care.

## Abstract

Cancer diagnosis originating in emergency departments (emergency presentation) contributes to poorer cancer survival and reflects aggressive disease and limited access to routine health care. This study characterized emergency presentations for a range of cancers and subclassified by whether patients were hospitalized after the emergency encounter, with the hypothesis that, compared with those hospitalized, patients not requiring hospitalization more specifically represent barriers to timely and adequate care.

We analyzed Surveillance, Epidemiology, and End Results–Medicare data for patients aged 66 years and older diagnosed with 14 cancer types (2008-2017; n = 614 885). We described emergency presentation overall and demographic and clinical characteristics across subgroups using linear regression and assessed differences in health-care utilization before the emergency presentation classification window.

In total, 234 606 (38%) patients were classified as emergency presentations, with 187 439 (80%) hospitalized. Emergency presentations were more likely than nonemergency presentations to have prediagnostic emergency care (40%, 95% confidence interval [CI] = 40% to 40%) vs 30% (95% CI = 29% to 30%) and less likely to have nonemergency care for potential cancer symptoms (61%, 95% CI = 61% to 61%, vs 67%, 95% CI = 67% to 67%), with minimal variation between inpatient and outpatient emergency presentations. Compared with inpatient emergency presentations, outpatient emergency presentations were more often younger than 70 years old (24%, 95% CI = 23% to 24%, vs 19%, 95% CI = 19% to 19%), nonmetropolitan residents (25%, 95% CI = 24% to 25%, vs 12%, 95% CI = 12% to 12%), and had localized cancer (25%, 95% CI = 25% to 26%, vs 17%, 95% CI = 17% to 17%).

More than one-third of older adult US cancer patients with these cancer types are diagnosed through emergency presentation, with most requiring hospitalization. Outpatient emergency presentations are more common among patients in rural areas with less advanced cancers, suggesting they may be an informative indicator of avoidable barriers to care less influenced by underlying health status.