The death rate from asthma has been increasing in the U.S. and in many
other countries and is considered unacceptably high. There is little
information as to circumstances surrounding these fatalities that woul
d lead to effective interventions to prevent deaths. In this study, ca
ses of asthma deaths from the Office of the Medical Examiner in Cook C
ounty, (Chicago), Illinois were identified in subjects 45 years of age
or less who died from asthma. We reviewed clinical information surrou
nding the deaths, contacted surviving kin, friends, or informants, and
reviewed autopsy findings and toxicologic results. Deaths were classi
fied as (1) from asthma, (2) probably from asthma, (3) of indeterminat
e cause, and (4) coincidental to but not from asthma. From 39 cases fr
om one pathologist's cases of asthma deaths during 1985-1992, deaths w
ere from or probably from asthma in 22139 (56.4%) of cases. Eight (20.
5%) cases were classified as indeterminate because of a positive or un
known asthma prodrome but in which toxicologic results were positive.
Nine (23.1%) cases were classified as death coincidental to but not fr
om asthma because of the absence of a prodrome of increased symptoms a
ssociated with positive toxicologic results. Overall from 23 cases whe
re some toxicologic testing was performed, 14 (60.8%) were positive, i
ndividually or in combination, for cocaine, benzoylecgonine (cocaine m
etabolite), codeine, phencyclidine (animal tranquilizer), morphine, me
thadone, and ethanol (>0.8 g/L). Out-of-hospital asthma deaths in 39 s
ubjects were complicated by a high incidence of illicit drug use, lack
of identifiable managing physicians, lack of antiinflammatory medicat
ions, and in some cases not having been examined by a physician in the
past year. Concomitant use of cocaine and bronchodilators may be espe
cially dangerous in patients with asthma.