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Cardiac Arrest Hospital Prognosis (CAHP) Score Validation in Out-of-Hospital Cardiac Arrest: Insights from Qatar

Amr Azzam Ashour1, Mohammed Awad A Ashour1, Anas A Ashour1

  • 1Department of Medical Education, Heart Hospital, Hamad Medical Corporation, Doha, Qatar.

Heart Views : the Official Journal of the Gulf Heart Association
|May 7, 2026
PubMed

Insights

The Cardiac Arrest Hospital Prognosis (CAHP) score reliably predicts survival and neurological outcomes in out-of-hospital cardiac arrest (OHCA) patients. Accurate CAHP scoring and bystander CPR are crucial for improving patient survival rates.

Area of Science:

  • Cardiology
  • Emergency Medicine
  • Clinical Research

Background:

  • Out-of-hospital cardiac arrest (OHCA) presents significant morbidity and mortality challenges.
  • The Cardiac Arrest Hospital Prognosis (CAHP) score is established for predicting outcomes in patients with return of spontaneous circulation (ROSC).
  • Validation of the CAHP score's prognostic performance in Qatar's OHCA population is needed, considering survival, neurological status, and bystander CPR impact.

Purpose of the Study:

  • To validate the prognostic accuracy of the CAHP score in a Qatari cohort of OHCA patients.
  • To assess the CAHP score's ability to predict 30-day survival and neurological outcomes.
  • To evaluate the influence of bystander-initiated cardiopulmonary resuscitation (CPR) on OHCA patient outcomes.

Main Methods:

  • Retrospective cohort study of adult OHCA patients admitted alive to Hamad Medical Corporation (June 2022 - October 2023).
  • Exclusion of patients without ROSC; data collection included demographics, clinical history, coronary findings, and CAHP scores (documented vs. auditor-calculated).
  • Assessment of 30-day survival and neurological status using Chi-square and Pearson correlation.

Main Results:

  • Ninety-two patients (mean age 51, 91.3% male) were analyzed; 64.1% had cardiac etiology, predominantly ST-elevation myocardial infarction (STEMI).
  • Overall 30-day survival was 71.7%, with 33.7% of survivors experiencing hypoxic brain injury; auditor-calculated CAHP scores differed significantly from documented values (P < 0.001).
  • Low-risk patients (CAHP < 150) had 93.6% survival with good neurological outcomes, compared to 57.5% (intermediate) and 10.5% (high-risk); bystander CPR (66.3%) was associated with improved survival (R = 0.217, P = 0.038).

Conclusions:

  • The CAHP score demonstrates reliability in predicting survival and neurological outcomes for admitted OHCA patients in Qatar.
  • Accurate CAHP score calculation is vital, as documented scores may underestimate patient risk.
  • Bystander CPR is a critical survival factor, emphasizing the need for community CPR training and CAHP score integration into OHCA management guidelines.
Abstract

Keywords:
Bystander cardiopulmonary resuscitationcardiac arrest hospital prognosis scoreneurological outcomesout-of-hospital cardiac arrestrisk stratification

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