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. Author manuscript; available in PMC: 2015 Nov 1.
Published in final edited form as: Resuscitation. 2014 Jul 8;85(11):1599–1609. doi: 10.1016/j.resuscitation.2014.06.031

TABLE 2.

Patient Characteristics, Care Process and Outcome Variables Collected

Variable Coding SJA-WA Cardiac
Arrest Registry		 Victorian
Ambulance
Cardiac Arrest
Registry		 CAVAS project Taipei OHCA
Registry		 Utstein Osaka
Project		 ROC Irish OHCAR ARREST Oslo and Akershus
Registry		 Swedish Register of
Cardiopulmonary
Resuscitation		 Helsinki Cardiac
Arrest Registry		 VICAR German
Resuscitation
Registry		 Average
Missingness or
Unknown (%)
Years Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected
Age Missing, % 0 0.4 0 0.1 0 0.7 2.2 0.9 1.8 5.2 0 1.1 0.1 1.0
Sex 1=Male / 2=Female / 9=Unknown Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected
Missing, % 0 0 0 0 0 0 0 0 0 0 0 0 3.3 0.3
Unknown, % n/a 0.05 0 0.1 n/a 0.1 n/a 0.12 n/a 0 0 n/a 0.02 0.0
Location of arrest 1=Home / 2=Public places 3=Other / 9=Unknown Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected
Missing, % 0 0 0 0.4 0 0.1 0.4 0 0.3 0 0 0.8 1.0 0.2
Unknown, % n/a n/a 5.9 0.07 n/a 0 n/a 0.02 n/a 0 0 n/a 0.8 1.0
Arrest, Witnessed 1=Witnessed/0=Not witnessed / 9=Unknown Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected
Missing, % 0.5 0 0 0 0 0 0 0.1 0.6 0 0 0 0 0.1
Unknown, % 0 0.4 10.1 0.2 n/a 5.5 5.1 1.4 n/a 4.9 0 n/a n/a 3.1
Type of Witness 1=Witnessed by laypersons /2=Witnessed by EMS / 3=Others / 4=Not witness / 9=Unknown Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected
Missing, % 0.5 0 0 0 0 0 6.1 0.1 0.6 0 0 0 0 0.6
Unknown, % 0 0.4 12.8 5.3 n/a 5.5 7.2 1.8 n/a 21.9 0 n/a n/a 6.1
Etiology of Arrest 1=Presumed cardiac etiology / 2=Trauma / 3=Respiratory / 4=Drowning / 5=Other / 9=Unknown Collected Collected Collected Collected Collected Collected Collected Collected Collected but not collated Collected Collected Collected Collected
Missing, % 0 0 0 6.3 0 0.2 0 0 n/a 0 0 0 20.8 2.3
Unknown, % 0 0 1.0 57.9 0.7 0 n/a 0.6 n/a 10.8 17.6 2.9 2.8 8.6
Bystander CPR 1=Yes / 0=No / 9=Unknown Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected
Missing, % 55.8 0 0 0 0 0 3.3 0.1 0.5 0 0 0 5.1 5.0
Unknown, % n/a 3.5 n/a 1.4 n/a 7 n/a 2.3 n/a 46.5 0.7 n/a 0.1 8.8
Chest compressions 1=Yes / 0=No / 9=Unknown Collected Collected Collected Collected Collected Collected Collected Collected Not collected (All cases received compressions) Collected Collected Not collected (All cases received compressions) Not collected (All cases received compressions)
Missing, % 0.6 0 0 0 0 0 0.4 0.0 0 0 0.1
Unknown, % n/a 0 n/a n/a n/a 0 n/a n/a 0.2 0 0.1
First monitored shockable/Non shockable rhythm 1=VF or VT / 2=PEA / 3=Asystole / 4=Other / 9=Unknown Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected Collected
Missing, % 0.4 0 0 0 0 1.9 12.9 2.8 0.3 0 0 11.7 4.0 2.6
Unknown, % n/a 0.9 16.2 16.6 n/a 2.2 n/a 3.2 n/a 12.8 0.7 3.7 1.2 6.4
Defibrillation attempt before EMS arrival 1=Yes / 0=No / 9=Unknown Collected Collected Collected Not collected Collected Collected Collected Collected Collected Collected Collected Collected Collected
Missing, % 99.0 0.03 0 0 0 4.5 0 0.3 0 0 0 0 8.7
Unknown, % n/a n/a n/a n/a 7.2 n/a 0.01 n/a 49.8 0 n/a 54.8 22.4
Attempted Defibrillation 1=Attempted defibrillation by layperson and/or EMS / 0=Not attempted defibrillation by layperson and EMS / 9=Unknown Collected Collected Collected EMS only Collected Collected Collected Collected Collected Collected Collected Collected Collected
Missing, % 0.6 0 0 0 0 0.2 4.5 0.02 0.4 0 0 0 0 0.4
Unknown, % n/a n/a n/a 1.5 n/a 5.1 n/a 1.0 n/a 4.7 0.4 n/a n/a 2.5
Assisted Ventilation 1=Assisted ventilations by EMS / 0=Not assisted ventilations by EMS / 9=Unknown Collected Collected Collected Collected Collected Collected Collected Not collected Collected Collected Collected Not collected Not collected
Missing, % 0 0 0 0 0 0.1 3.3 0.3 0 0 0.4
Unknown, % 0.6 n/a n/a n/a n/a 0 n/a n/a 0.2 1.8 0.7
Drugs 1=Epinephrine / 2=Other drugs / 0=No drug / 9=Unknown Collected Collected Collected Collected Collected Collected Collected Not collected Collected Collected Collected Collected Collected
Missing, % 0 0.09 0 0 0 0.7 1.4 1.3 0 0.1 0 0 0.3
Unknown, % 0.6 n/a n/a n/a n/a 0 n/a n/a 0.7 0 n/a 0.1 0.3
ROSC before ED 1=Yes / 0=No / 9=Unknown Collected ROSC at any time Collected Collected Collected Collected Collected Collected Collected Not collected Collected ROSC at any time Collected
Missing, % 0 0 0 0 0 0.2 6.3 0.02 0 0 0 0 0.5
Unknown, % 0 0 n/a n/a n/a 0 n/a 0.6 n/a 0 n/a 2.5 0.5
ROSC sustained to ED arrival 1=Yes / 0=No / 9=Unknown Collected Collected Collected Not collected Collected Collected Collected Collected Collected Not collected Collected Not collected Collected
Missing, % 0 0 0 0 7.8 7.5 0.02 0 0 20.5 3.6
Unknown, % 0 0 n/a n/a 0.9 n/a 1.3 n/a 0 0.1 0.4
Hospital Admission 1=Yes / 0=No / 9=Unknown Collected Not collected Collected Collected Collected Collected (only from Jun 2007 to Nov 2009) Not collected Collected Collected Collected Collected Not collected Collected
Missing, % 0.6 0 0 0 0.2 0.02 0 0 0 20.5 2.1
Unknown, % n/a n/a 6.0 n/a 0 1.3 n/a 1.9 0 0.1 1.6
Survival to Hospital Discharge 1=Discharged alive / 0=Not discharged alive / 9=Unknown Collected Collected Collected Collected Collected (30 days) Collected Collected Collected Collected Collected Collected Collected Collected
Missing, % 0.6 2.4 0 0 0.1 0.7 1.2 0.6 0 0 0 0 20.0 2.0
Unknown, % n/a 0 0 6.8 n/a 0 n/a 0.4 n/a 6.8 0 n/a 0.0 1.8
Neurological Status at Discharge 1=CPC1 and CPC2, 0=CPC3, CPC4, and CPC5 / 9=Unknown Collected but not collated Collected but not collated (12 months) Collected Collected Collected (30 days) Collected Collected Collected Collected Collected Collected Collected Collected
Missing, % n/a n/a 0 0 0.1 5.8 2.0 0.7 0 0 0 8.0 19.7 3.3
Unknown, % n/a n/a n/a 7.7 n/a 0 n/a 1.4 n/a 94.0 0 n/a 1.4 17.4