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JSTAR: Study Overview
JSTAR is a panel survey of people between the ages of 50 and 75, living in private households in Japan. Its main goal is to provide a data resource on aging and retirement that is comparable to the Health and Retirement Study (HRS), the Survey of Health, Aging and Retirement in Europe (SHARE), and the English Longitudinal Study of Aging (ELSA). The survey elicits information about demographics, family structure, cognition, job status and history, health, income, assets, housing, and health care use and costs.
The JSTAR sample is a sample of the population between the ages of 50 and 75, living in private households in Japan. The initial sample was recruited in 2007 using a stratified random sampling of individuals within each of five pre-chosen municipalities.
|Age Eligibility||Age 50 to 75|
|People Interviewed per Household||One person per household|
|Representativeness||Not nationally representative|
The JSTAR core interview is carried out every two years through face-to-face interviews using computer-assisted personal interviewing (CAPI) since 2007.
In addition to the core interview, JSTAR also collects a number of other types of data.
|End of Life Interview||Conducted starting at Wave 2 with someone knowledgeable about deceased respondents.|
|Self-Completion Survey||At each wave, a general self-completion survey is provided to all respondents prior to the CAPI survey.|
|Dietary Habit Survey||Self-completion survey on dietary habits provided to all respondents at each wave.|
|Health Assessment||Conducted at each wave for all respondents.|
The JSTAR Wave 1 sample included 8,000 eligible individuals. Since then, the JSTAR sample has been refreshed at waves 2 and 3. When a refreshment sample is drawn, individuals are selected from additional municipalities using stratified random sampling.
JSTAR has included linkages to administrative data since Wave 1. Respondents are asked for permission to link to official records of National Health Insurance and Long-term Care Insurance.
|Medical Records||National Health Insurance|
|Elderly Care||Long-Term Care Insurance|
Public access JSTAR data can be downloaded from the Research Institute of Economy, Trade and Industry (RIETI). There are two levels of access available from RIETI: 1) High (H) confidentiality, 2) Very High (VH) confidentiality. Level H data include anonymized randomly selected data, constituting 90% of the total sample, and are available by request from RIETI. Level VH data include the full sample containing geographic information to the municipality level and are only available via secure remote access.
End of life interview
The Gateway to Global Aging Data has created a user-friendly dataset based on JSTAR data designed to allow researchers to conduct cross-wave and cross-study analysis.
|Harmonized JSTAR||A dataset of research-ready variables derived from the core interviews and health assessments of Waves 1-4.||Download via JSTAR website|
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