The results are presented for adult witnesses aged 50 years or younger versus those older than 50 years:
the populations of adult witnesses were 23,879 and 8,733, respectively;
the annual numbers of cardiac arrests witnessed were 7.3 and 14.6, respectively;
the numbers of potential witnesses per arrest were 3,271 and 598, respectively;
the proportions of an age group that would witness an arrest were 0.03% and 0.17%, respectively;
the proportions of individuals in traditional CPR courses were 93.2% and 6.8%, respectively; and
the numbers of traditional CPR course attendees to be trained per cardiac arrest were 3,510 and 8,896, respectively.