Table 18-6.

2015 Quality-of-Care Metrics for OHCA in ROC Epistry, January 1, 2015 to June 30, 2015

Metrics	Overall	Adults	Children*
Prehospital metrics†
Bystander CPR, %	45.7 (44.1–47.4)	45.6 (43.9–47.2)	53.5 (44.4–62.7)
Shocked by AED before EMS, %	2.3 (1.8–2.7)	2.2 (1.8–2.7)	2.6 (0.0–5.6)
Chest compression fraction during first 5 min of CPR	0.86 (0.12)	0.86 (0.12)	0.87 (0.11)
Compression depth, mm	49.3 (10.2)	49.3 (10.2)	48.6 (10.0)
Preshock pause duration, s	10.3 (10.5)	10.4 (10.5)	7.3 (5.8)
Time to first EMS defibrillator applied, min	8.5 (4.3)	8.5 (4.3)	8.5 (5.9)
Dispatcher-assisted CPR, %	11.3 (10.3–12.3)	11.3 (10.3–12.4)	10.5 (4.9–16.2)
Hospital-based metrics, %
Hypothermia induced after initial VT/VF‡	68.1 (62.1–74.2)	68.1 (62.1–74.2)	NA
No order for withdrawal/DNR during first 72 h§	64.9 (60.4–69.3)	64.9 (60.4–69.3)	NA
Implantable cardioverter-defibrillator assessment, initial VT/VF, no AMI per MD notes or final ECG interpretation|	24.1 (15.1–33.1)	24.1 (15.1–33.1)	NA

Values are mean (95% confidence interval) or mean (SD). AED indicates automated external defibrillator; AMI, acute myocardial infarction; CPR, cardiopulmonary resuscitation; DNR, do not resuscitate; EMS, emergency medical services; MD, medical doctor; NA, not applicable; OHCA, out-of-hospital cardiac arrest; ROC, Resuscitation Outcomes Consortium; VF, ventricular fibrillation; and VT, ventricular tachycardia.

^*During the first 6 months of 2015, there were 6 pediatric cases with initial rhythm VT/VF that were admitted to a hospital; none had data collected on hospital-based metrics.

^†Prehospital metrics data are from EMS-treated cases.

^‡Denominator is all cases with initial rhythm VT/VF and admitted to hospital.

^§Denominator is all cases admitted to hospital.

^|Denominator is all cases with initial rhythm VT/VF, no indication of AMI, no percutaneous coronary intervention, no bypass, and admitted to hospital.

Source: ROC Investigators, unpublished data, July 7, 2016.