Table 1.

Developed predictive scores and risk classifications for PCAS. Four score—full outline of unresponsiveness score; SOFA score—sequential organ failure assessment score; ESRD—end-stage renal disease; CAD—coronary artery disease; ROSC—return of spontaneous circulation; GCS—Glasgow coma scale; GWR—gray–white matter ratio.

Name	Reference	Variables	No of Variables	Simplified or Not (Do Not Need Electric Devices)	Risk Classification (More Than 3 Risk Groups)
OHCA score	[24]	Initial rhythm, no flow time, low flow time, lactate, creatinine	5	Not	Not shown
CAHP score	[25]	Age, location of cardiac arrest, initial rhythm, no flow time, low flow time, pH, epinephrin dose	7	Not	Low risk (score ≤ 150), Medium risk (score 150–200) High-risk group (score ≥ 200)
PCAC	[26,27]	Motor and brain stem scale of FOUR score, cardiovascular and respiratory scale of SOFA score	4	Simplified	Mild coma: PCAC 1 Moderate coma and mild cardiopulmonary failure: PCAC 2 Moderate coma and severe cardiopulmonary failure: PCAC 3 Severe coma: PCAC 4
NULL-PLEASE score	[28]	Initial rhythm, age, presence of witness, no flow time, low flow time, pH, lactate, past medical history of ESRD, still resuscitation, extra-cardiac cause	10	Simplified	Not shown
C-GRApH	[29]	Past medical history of CAD, glucose, initial rhythm, age, pH	5	Simplified	Low severity group: ≤1 Medium severity group: 2 and 3 High severity group: ≥4
CAST score	[30,31]	Initial rhythm, presence of witness and time to ROSC, motor scale of GCS, albumin, hemoglobin, pH, lactate, GWR	8	Not	Not shown
rCAST score	[32]	Initial rhythm, presence of witness and time to ROSC, motor scale of GCS, pH, lactate	5	Simplified	Low severity group: ≤5.5 Moderate severity group: between 6.0 and 14.0 High severity group: ≥14.5