Table 1

Patient and arrest characteristics

	Exercise SCA		Presumed cardiac OHCA*
	N	Per cent	N	Per cent
Age (mean with range in parentheses)	49.7 (9–84)		68.0 (1–108)		t(105.1)=9.61, p<0.001
Initial rhythm					χ²=89.57, df=3, p<0.001
VF/VT	68	68	1745	26
Asystole	23	23	3156	47
PEA	9	9	1739	26
Unknown	0	0	73	1

NB—due to rounding percentages may not equal 100%.
*Cases where resuscitation was attempted.
OHCA, out-of-hospital cardiac arrest; PEA, pulseless electrical activity; SCA, sudden cardiac arrest; VF/VT, ventricular fibrillation/ventricular tachycardia.