Design: Retrospective analysis of prospective multicentre PE registry data
Population: 1,731 ED patients with pulmonary embolism across 6 academic EDs
Primary outcome: In-hospital death or clinical deterioration
Effect: CPES ≥3 sensitivity 72%, specificity 57%, AUC 0.68; advanced intervention AUC 0.78

Risk-stratifying pulmonary embolism in the ED decides who can go home, who needs monitoring and who needs escalation. This study compared the Composite Pulmonary Embolism Shock (CPES) score with the simplified PESI and ESC classifications in 1,731 patients from six academic EDs.

For the main outcome of in-hospital death or deterioration, CPES performed much like sPESI and the ESC categories (a score of 3 or more gave 72% sensitivity, 57% specificity, area under the curve 0.68). Its advantage was in identifying patients who went on to need advanced intervention — thrombolysis, embolectomy or similar — where it separated better (area under the curve 0.78), and a central thrombus independently predicted that need.

The practical message is to use whichever validated score your department knows, but to reach for CPES when the question is specifically whether a patient is heading toward advanced therapy. No score replaces serial reassessment of a patient who looks unwell.

CPES, sPESI and the ESC classification performed similarly for death or deterioration.
CPES separated better for who needed advanced intervention (AUC 0.78).
A central (saddle or main-artery) thrombus independently predicted advanced intervention.
Use a validated score to support, not replace, serial reassessment of the unwell PE patient.

Why it matters

It clarifies that the newer PE shock score earns its place for predicting escalation, not for everyday mortality triage.

The statistics, in plain English

An area under the curve of 0.68 is modest discrimination (0.5 is chance, 1.0 perfect), similar across the tools; the higher 0.78 for advanced intervention is where CPES genuinely adds.