Survey of Midlife in Japan (MIDJA): Biomarker Project, 2009-2010 (ICPSR 34969)

Version Date: Mar 20, 2018 View help for published

Principal Investigator(s): View help for Principal Investigator(s)
Hazel Markus, Stanford University; Christopher Coe, University of Wisconsin; Carol Ryff, University of Wisconsin; Mayumi Karasawa, Tokyo Woman's Christian University; Norito Kawakami, University of Tokyo; Shinobu Kitayama, University of Michigan


Version V2 ()

  • V2 [2018-03-20]
  • V1 [2014-07-03] unpublished

The MIDJA Biomarker study obtained biological assessments from a subsample (n=382) of MIDJA Survey (ICPSR 30822) respondents (N=1027). Participants traveled to a clinic near the University of Tokyo campus where Biomarker data (vital signs, morphometric assessments, blood assays, and medication data) were obtained. Participants also provided daily saliva samples for cortisol assessment and completed a self-administered medical history questionnaire. The questionnaire included assessments of conditions and symptoms, major health and life events, nutrition/diet, and additional psychosocial measures (anxiety, depression, relationship quality, control etc.). These measures parallel those in a national longitudinal sample of midlife Americans known as MIDUS (ICPSR 4652: MIDUS II and ICPSR 2760: MIDUS I). The central objective is to compare the Japanese sample (MIDJA) with the United States sample (MIDUS) to test the hypotheses regarding cultural differences in aging health and well-being as well as in how psychosocial factors are linked with biological factors known to influence profiles of disease and disability.

Asia   Tokyo   Japan   Global


Inter-university Consortium for Political and Social Research
2009-01 -- 2010-04
2009-01 -- 2010-04

This deposit is a new addition to the Midlife Development in the United States (MIDUS) Series

The title of this study was changed from Survey of Midlife Development in Japan (MIDJA): Biomarker Project, 2009-2010, to Survey of Midlife in Japan (MIDJA): Biomarker Project, 2009-2010, on May 9, 2017.

Additional information about the Survey of Midlife Development in Japan can be found at the MIDUS web site.

This data is a subsample of the MIDJA Survey. There were two eligibility criteria for this second phase of the data collection: (1) completed the initial survey phase and (2) expressed interest in participating in the second, biomarker, phase by returning a post card to CRS as described above.

A subsample of the MIDJA Survey sample (ICPSR 30822) which is comprised of non-institutionalized, Japanese-speaking adults, aged 30-79 and living in one of the 23 wards of Tokyo from April 2008-September 2008.

clinical data, survey data

See the "Documentation of Scales and Constructed Variables in MIDJA Biomarker" available through the ICPSR and NACDA Web sites for complete information regarding the scales for the MIDJA Biomarker data collection.


2018-03-20 A second dataset was added to the study (DS2: Stacked Medication file). And existing data files and documents were re-submitted to reflect the new change in the Study title.

2018-02-15 The citation of this study may have changed due to the new version control system that has been implemented. The previous citation was:
  • Markus, Hazel, Christopher Coe, Carol Ryff, Mayumi Karasawa, Norito Kawakami, and Shinobu Kitayama. Survey of Midlife in Japan (MIDJA): Biomarker Project, 2009-2010. ICPSR34969-v2. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2018-03-20.

2014-07-03 This is a subsample of the MIDJA Survey.


  • The public-use data files in this collection are available for access by the general public. Access does not require affiliation with an ICPSR member institution.

NACDA logo

This study is maintained and distributed by the National Archive of Computerized Data on Aging (NACDA), the aging program within ICPSR. NACDA is sponsored by the National Institute on Aging (NIA) at the National Institutes of Heath (NIH).