Marathon related cardiac arrest risk differences in men and women.
OBJECTIVE
To determine the incidence of sudden cardiac arrest (SCA) and sudden cardiac death (SCD) in men and women.


METHODS
Retrospective cohort study.


METHODS
Two popular urban 42 km marathons.


METHODS
1982 to 2009 finishers.


METHODS
Race records were assessed for finishers, age distribution and cardiac events by sex.


METHODS
The SCA/SCD incidence for all (total), male and female finishers.


RESULTS
There were 548,092 finishers with women finishers increasing from 10% to 40% over the first 18 years and remaining near 40% for the last decade. There were 14 SCA events (1 woman, 13 men) with seven successful resuscitations yielding an all finishers SCA rate of 2.6 per 100,000 finishers. The SCA rates (per 100,000) for men and women were 3.4 (95% CI: 1.8 to 5.9) and 0.6 (95% CI: 0.0 to 3.3), respectively (p=0.079). The male SCA rate for the 2000-2009 decade was 4.6 per 100,000 finishers (95% CI: 1.8 to 9.5). Eleven of 13 men were >39 years old. The OR of a man experiencing SCA compared with woman was 5.7.


CONCLUSIONS
As the number of women participating in these two marathons has increased, the difference between the men's and total SCA and SCD incidence has increased for men, especially >39 years old, from coronary artery disease with men's incidence for SCA of 1 in 22,000 and SCD at 1 in 50,000 finishers over past decade.
Department of Family Medicine and Community Health, University of Minnesota, St Paul, Minnesota 55106, USA. rober037@umn.edu
William O
WO
Roberts
Dana M
DM
Roberts
Scott
S
Lunos
D000328:Adult; D000367:Age Factors; D016757:Death, Sudden, Cardiac / Q000453:epidemiology / Q000209:etiology* / Q000517:prevention & control; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D008910:Minnesota / Q000453:epidemiology; D012189:Retrospective Studies; D012307:Risk Factors; D012420:Running / Q000502:physiology* / Q000706:statistics & numerical data; D017678:Sex Distribution; D012737:Sex Factors; D014768:Virginia / Q000453:epidemiology; D055815:Young Adult