OHCA score⁽¹⁾

For all witnessed adult OHCA patients.

Exclusion

Younger than 18 years.
Without bystander witnessed cardiac arrest.

CAHP score⁽²⁾

For intrinsic cardiac arrest patients 10 years or older with bystander witnessed cardiac arrest.

Exclusion

Cardiac arrest induced by circumstantial causes (such as trauma, hanging, drowning, intoxication, or asphyxia).
Younger than 18 years.

NULL-PLEASE score⁽³⁾

All adult OHCA patients.

Exclusion

Younger than 18 years.

rCAST score⁽⁴⁾

For adult patients with non-traumatic cardiac arrest who underwent TTM at 33-36°C.

Exclusion

Younger than 18 years.
Underwent TTM at ≤32°C.
Required extracorporeal membrane oxygenation.

Formula for the probability of poor prognosis (x = points for each score)

OHCA score*: poor prognosis (%) = 104.2578/(1+3.363926e^-0.067359x)

CAHP score*: poor prognosis (%) = 100.0506/(1+772.3823e^-0.048742x)

NULL-PLEASE score**: poor prognosis (%) = 100/(1+3.077138e^-0.662x)

rCAST score**: poor prognosis (%) = 100/(1+6.7328599e^-0.293x)

* The OHCA and CAHP score prognostic formulas were created by back-calculating the graphs of the original papers.
** The prognostic equations for the NULL-PLEASE and rCAST scores were created using the results of binomial logistic regression analysis of our data.

1. Adrie C, Cariou A, Mourvillier B, Laurent I, Dabbane H, Hantala F, et al. Predicting survival with good neurological recovery at hospital admission after successful resuscitation of out-of-hospital cardiac arrest: the OHCA score. Eur Heart J. 2006;27(23):2840-5.(External Link )
2. Maupain C, Bougouin W, Lamhaut L, Deye N, Diehl JL, Geri G, et al. The CAHP (Cardiac Arrest Hospital Prognosis) score: a tool for risk stratification after out-of-hospital cardiac arrest. Eur Heart J. 2016;37(42):3222-8.(External Link )
3. Potpara TS, Mihajlovic M, Stankovic S, Jozic T, Jozic I, Asanin MR, et al. External Validation of the Simple NULL-PLEASE Clinical Score in Predicting Outcome of Out-of-Hospital Cardiac Arrest. Am J Med. 2017;130(12):1464 e13- e21.(External Link )
4. Nishikimi M, Ogura T, Nishida K, Takahashi K, Nakamura M, Matsui S, et al. External validation of a risk classification at the emergency department of post-cardiac arrest syndrome patients undergoing targeted temperature management. Resuscitation. 2019;140:135-41.(External Link )

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