The CAHP (Cardiac Arrest Hospital Prognosis) score: a tool for risk stratification after out-of-hospital cardiac arrest.
Survival after out-of-hospital cardiac arrest (OHCA) remains disappointingly low. Among patients admitted alive, early prognostication remains challenging. This study aims to establish a stratification score for patients admitted in intensive care unit (ICU) after OHCA, according to their neurological outcome.



The CAHP (Cardiac Arrest Hospital Prognosis) score was developed from the Sudden Death Expertise Center registry (Paris, France). The primary outcome was poor neurological outcome defined as Cerebral Performance Category 3, 4, or 5 at hospital discharge. Independent prognostic factors were identified using logistic regression analysis and thresholds defined to stratify low-, moderate-, and high-risk groups. The CAHP score was validated in both a prospective and an external data set (Parisian Cardiac Arrest Registry). The developmental data set included 819 patients admitted from May 2011 to December 2012. After multivariate analysis, seven variables were independently associated with poor neurological outcome and subsequently included in the CAHP score (age, non-shockable rhythm, time from collapse to basic life support, time from basic life support to return of spontaneous circulation, location of cardiac arrest, epinephrine dose, and arterial pH). Three risks groups were identified: low risk (score ≤150, 39% of unfavourable outcome), medium risk (score 150-200, 81% of unfavourable outcome) and high-risk group (score ≥200, 100% of unfavourable outcome). The AUC of the CAHP score were 0.93, and the discrimination value in the validation data sets was consistent (respectively, AUC 0.91 and 0.85).



The CAHP score represents a simple tool for early stratification of patients admitted in ICU after OHCA. A high-risk category of patients with very poor prognosis can be easily identified.
Paris Sudden Death Expertise Center, INSERM U970 (PARCC), Paris, France.|Paris Descartes-Sorbonne Cité University, Paris, France.
Carole
C
Maupain
Paris Sudden Death Expertise Center, INSERM U970 (PARCC), Paris, France.|Paris Descartes-Sorbonne Cité University, Paris, France.|Intensive Care Unit, Cochin Hospital, AP-HP, Paris, France.
Wulfran
W
Bougouin
Paris Sudden Death Expertise Center, INSERM U970 (PARCC), Paris, France.|Paris Descartes-Sorbonne Cité University, Paris, France.|Department of Anesthesiology and Emergency Medical Services-SAMU 75-, Necker Hospital, AP-HP, Paris, France.
Lionel
L
Lamhaut
Paris Sudden Death Expertise Center, INSERM U970 (PARCC), Paris, France.|Intensive Care Unit, Lariboisière University Hospital, AP-HP, Paris, France.
Nicolas
N
Deye
Paris Descartes-Sorbonne Cité University, Paris, France.|Medical Intensive Care Unit, Georges Pompidou European Hospital, AP-HP, Paris, France.
Jean-Luc
JL
Diehl
Paris Sudden Death Expertise Center, INSERM U970 (PARCC), Paris, France.|Paris Descartes-Sorbonne Cité University, Paris, France.|Intensive Care Unit, Cochin Hospital, AP-HP, Paris, France.
Guillaume
G
Geri
Paris Sudden Death Expertise Center, INSERM U970 (PARCC), Paris, France.
Marie-Cécile
MC
Perier
Paris Sudden Death Expertise Center, INSERM U970 (PARCC), Paris, France.
Frankie
F
Beganton
Paris Sudden Death Expertise Center, INSERM U970 (PARCC), Paris, France.|Paris Descartes-Sorbonne Cité University, Paris, France.|Cardiology Department, Georges Pompidou European Hospital, AP-HP, Paris, France.
Eloi
E
Marijon
Paris Sudden Death Expertise Center, INSERM U970 (PARCC), Paris, France.|Paris Descartes-Sorbonne Cité University, Paris, France.|Cardiology Department, Georges Pompidou European Hospital, AP-HP, Paris, France.
Xavier
X
Jouven
Paris Sudden Death Expertise Center, INSERM U970 (PARCC), Paris, France.|Paris Descartes-Sorbonne Cité University, Paris, France.|Intensive Care Unit, Cochin Hospital, AP-HP, Paris, France.
Alain
A
Cariou
Paris Sudden Death Expertise Center, INSERM U970 (PARCC), Paris, France florence.dumas@cch.aphp.fr.|Paris Descartes-Sorbonne Cité University, Paris, France.|Emergency Department, Cochin-Hotel-Dieu Hospital, APHP, Paris, France.
Florence
F
Dumas
D016887:Cardiopulmonary Resuscitation; D005602:France; D006801:Humans; D058687:Out-of-Hospital Cardiac Arrest; D010297:Paris; D011379:Prognosis; D011446:Prospective Studies
Cardiac arrest; Prognosis; Sudden cardiac death