Background and methods: A cohort study investigating medical costs associated with the combination of hypertension and diabetes was conducted. The participants included 4535 community-dwelling Japanese individuals, aged 40–69 years, who were classified into the following four categories: ‘Neither hypertension nor diabetes’, ‘Hypertension alone’, ‘Diabetes alone’ or ‘Both hypertension and diabetes’. Medical costs per person per month were compared among the four categories.
Results and conclusion: Of the study population, 1.3% had both hypertension and diabetes. During the 10-year follow-up period, participants with both hypertension and diabetes incurred higher medical costs, as compared with those without hypertension, diabetes or their combination, even after adjustment for other confounding factors.
aDepartment of Health Science, Shiga University of Medical Science, Otsu City, Shiga
bDepartment of Hygiene and Preventive Medicine, Fukushima Medical University, Fukushima City, Fukushima
cDepartment of Public Health Science, Shimane University School of Medicine, Izumo City, Shimane
dDepartment of Preventive Cardiology, National Cardiovascular Center, Suita City, Osaka, Japan
*Members of the committee are listed in the Appendix.
Received 29 January, 2006
Accepted 30 June, 2006
Correspondence and requests for reprints to Koshi Nakamura, MD, PhD, Department of Health Science, Shiga University of Medical Science, Seta Tsukinowa-cho, Otsu City, Shiga, 520-2192, Japan Tel: +81 77 548 2191; fax: +81 77 543 9732; e-mail: firstname.lastname@example.org
Sponsorship: The study was funded by a research grant from the Ministry of Health, Labour and Welfare (H17-kenko-007).