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Diabetes Care, Vol 20, Issue 9 1396-1402, Copyright © 1997 by American Diabetes Association
Excess costs of medical care for patients with diabetes in a managed care population
JV Selby, GT Ray, D Zhang and CJ Colby
Division of Research, Kaiser Permanente Medical Care Program, Oakland, CA 94611, USA.
OBJECTIVE: To estimate the excess costs of medical care for patients with
diabetes in a managed care population and to determine the proportion of
costs spent on treating the complications of diabetes. RESEARCH DESIGN AND
METHODS: A comparison of 1-year (1994) costs of medical care in the 85,209
members of the diabetes registry of Kaiser Permanente, Northern California,
and in 85,209 age- and sex-matched nondiabetic control subjects. Costs were
obtained from automated program databases. Costs specifically related to
treating acute and long-term complications of diabetes were identified, and
the excess costs attributable to each complication in individuals with
diabetes were calculated. RESULTS: Excess expenditures in individuals with
diabetes totaled $282.7 million, or $3,494 per person. Per person
expenditures for members with diabetes were 2.4 times those for matched
control subjects. The largest proportion of total excess costs was for
hospitalizations within the health maintenance organization (38.5%). Nearly
38% of the total excess was spent treating the long-term complications of
diabetes, predominantly coronary heart disease and end-stage renal disease.
CONCLUSIONS: Diabetes is a costly condition by virtue of its high
prevalence and high per person costs. A large proportion of these costs are
related to treating complications of diabetes. Available evidence indicates
that several measures can reduce complication rates. Thus, effective
disease management programs that aim to prevent complications could
potentially lead to cost savings in managed care settings.

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Copyright © 1997 by the American Diabetes Association.
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