Table 1:

Demographic and clinical characteristics of patients with cardiac arrest occurring in a private residence, by floor of patient contact

CharacteristicFloor of contact; no. (%) of patients*p value
< Floor 3
n = 5998		≥ Floor 3
n = 1844
Age, yr, mean ± SD70.6 ± 15.970.8 ± 15.60.8
Sex, male3773/5998 (62.9)1077/1844 (58.4)< 0.001
Event witnessed by bystander2504/5954 (42.1)727/1832 (39.7)0.07
Bystander performed CPR2102/5998 (35.0)671/1844 (36.4)0.3
Time from 911 call response to arrival on scene, min, mean ± SD6.2 ± 2.36.2 ± 2.20.9
Initial shockable rhythm present1136/5976 (19.0)243/1827 (13.3)< 0.001
Time from arrival of 911 responder† to patient contact, min, mean ± SD3.0 ± 2.04.9 ± 2.60.01
Return of spontaneous circulation1738/5998 (29.0)478/1844 (25.9)0.01
AED application before arrival of 911 responder†19 (0.3)7 (0.4)0.8

  • Note: AED = automated external defibrillator, CPR = cardiopulmonary resuscitation, SD = standard deviation.

  • ↵* Except where indicated otherwise.

  • ↵† 911-initiated first responders include both paramedics and fire department personnel.