Table 1.

 Age, sex, and various factors at resuscitation (n = 16712)

Characteristic	Number with missing information	Median (25%, 75% centiles) or percentage
Age (years)	701	72 (60, 79)
Female patients	825	31%
Cardiac cause	1382	66%
Arrest occurred at home	195	71%
Bystander CPR	757	32%
Bystander witnessed arrest	1610	56%
Interval between call for and arrival of ambulance (min)	717	7 (4, 11)
Interval between collapse and call for ambulance among bystander witnessed cases only (min)	1675	5 (2, 10)

CPR, cardiopulmonary resuscitation.