Individual Study / Ichiro Tsuji_J Epidemiol_1998

Ohsaki National Health Insurance Cohort Study

Ohsaki National Health Insurance Cohort Study

Initiatives -
To examine the impact of health-related lifestyle and utilization of preventive health services such as screening program upon medical care utilization and its costs. This knowledge would lead us to better provision of cost-effective preventive health services. * Note: All published information has been collected from the article referenced in the Marker Paper box below. Therefore, there may be variations with more advanced versions of the study.*
Start Year
End Year
Scientific Research Grant for Community Health Care (Chiiki Hoken Kenkyuu Jigyou) of Ministry of Health and Welfare, Japan


Investigators Contacts
  • Dr. Prof. Ichiro Tsuji
    Tohoku University Graduate School of Medicine


Study design
Population cohort
Follow Up
Collection of data on medical care use and its costs for each subject from the monthly National Health Insurance (NHI) claim history files of the Miyagi NHI Association since January 1995.

Marker Paper

Tsuji I, Nishino Y, Ohkubo T, Kuwahara A, Ogawa K, Watanabe Y, Tsubono Y, Bando T, Kanemura S, Izumi Y, Sasaki A, Fukao A, Nishikori M, Hisamichi S. A prospective cohort study on National Health Insurance beneficiaries in Ohsaki, Miyagi Prefecture, Japan: study design, profiles of the subjects and medical cost during the first year. J Epidemiol. 1998 Dec;8(5):258-63. doi: 10.2188/jea.8.258. PMID: 9884474.

PUBMED 9884474


Sources of Recruitment
  • Individuals

Number of participants

Number of participants
Number of participants with biosamples
Supplementary Information
Aged from 40 to 79 years living in the catchment area of Ohsaki Public Health Center, Miyagi, Japan.


Availability of data and biosamples