Diabetes Care, Vol 16, Issue 1 277-283, Copyright © 1993 by American Diabetes Association
Cardiovascular disease among American Indians and Alaska Natives
TK Welty and JL Coulehan
Aberdeen Area Indian Health Service, Rapid City, South Dakota 57702.
OBJECTIVE--To compare the regional differences in cardiovascular disease in
AI/AN with the U.S. general population and determine the parity gap and
preventable proportion of cardiovascular mortality. RESEARCH DESIGN AND
METHODS--Age-adjusted cardiovascular disease mortality rates for 1981-1983
and hospital discharge rates for 1982-1984 reported by the IHS were
compared with U.S. data for 1982 and 1983, respectively. RESULTS--Rates of
ischemic heart disease and atherosclerosis were found to be generally low
among AI/AN although those in the 25- to 44-yr age-group have higher death
rates from cardiovascular disease than in the U.S. population. Although the
mortality rate from cardiovascular disease in AI/AN is 19% lower than the
rate for the general U.S. population, the parity gap in individual regions
of the U.S. ranges from favorable to extremely unfavorable. There were also
wide variations in the preventable gap theoretically possible by reduction
of the three major risk factors. CONCLUSIONS--Changing nutrition and
exercise patterns and the increasing prevalence of diabetes in many Indian
tribes may have adverse effects in the future, possibly increasing the
prevalence of heart disease. Regional differences in the prevalence of some
major cardiovascular risk factors (smoking, hypertension,
hypercholesterolemia, and diabetes) are the probable explanation for these
differences in cardiovascular morbidity and mortality rates. Prevention and
treatment of these risk factors will have the greatest impact in attempts
to reduce cardiovascular disease among AI/AN. In addition, moderation in
the use of alcohol, or abstinence, may prevent sudden deaths resulting from
acute intoxication.