Recognition of out-of-hospital cardiac arrest during emergency calls — a systematic review of observational studies

Table 4 Reported exclusion criteria in the individual studies

Author, year of publication	Exclusion Criteria
Author, year of publication	Age < 18	Trauma/Non cardiac origin	Non-Shockable rhythm	Unwitnessed	No AED use	Caller not at site	DOA	ALS-care not initiated	Inter-hospital transfer	EMS-witnessed	Patient not in OHCA during call	OHCA in HCF	Medical personnel performing CPR	Police, Fire-fighter or GP on duty	EMDC by passed	Secondary emergency call	Interrupted call
[26]										✓	✓
[7]		✓				✓	✓	✓			✓			✓		✓
[28]		✓
[27]	✓	✓								✓
[22]									✓	✓					✓
[19]
[21]	✓					✓					✓	✓	✓				✓
[21]	✓					✓					✓	✓	✓				✓
[29]			✓	✓						✓
[30]		✓	✓	✓
[6]	✓	✓								✓		✓			✓
[14]	✓	✓
[25]		✓								✓
[15]	✓^a
[28]	✓^b				✓	✓					✓
[14]		✓					✓			✓

^a = Age < 17, ^b = Age < 16. US: United States, NO: Norway, ALS: Advanced Life Support, AED: Automated External Defibrillator, OHCA: Out-of-Hospital Cardiac Arrest, EMS: Emergency Medical Services, HCF: Health care facility, CPR: Cardiopulmonary Resuscitation, GP: General Practitioner, VF: Ventricular fibrillation, EMDC: Emergency Medical Dispatch Centre, DOA: Dead on arrival