Longitudinal and Repeated Data Portals

Colectica Portal is built to search and display data documentation for longitudinal and repeated data collections. Variables can be harmonized and linked across study waves, and changes in measurements, coding, and descriptions are encoded using open data documentation standards such as DDI. Questionnaires from multiple waves can be documented, including sections, routing and filter questions, and linked to the data which was collected.

Colectica Portal uses Colectica Repository to store and index the graph of information used to describe these complex studies. For more information, please reach out and contact us.

Midlife in the United States

Midlife in the United States, a National Longitudinal Study of Health and Well-Being.

http://midus.colectica.org

CLOSER Discovery

CLOSER Discovery is an online resource that enables researchers to search the data from eight leading UK longitudinal studies.

The studies include

• Avon Longitudinal Study of Parents and Children
• 1970 British Cohort Study
• Hertfordshire Cohort Study
• Millennium Cohort Study
• 1958 National Child Development Study
• MRC National Survey of Health and Development
• Southampton Women’s Survey
• Understanding Society

https://discovery.closer.ac.uk

Statistics New Zealand DataInfo+

DataInfo+ gives users one place to search and browse for information about Statistics New Zealand's statistical activities and data.

http://datainfoplus.stats.govt.nz

NACDA-ICPSR Portal

The NACDA-ICPSR Portal facilitates efficient comparisons of longitudinal data across longitudinal studies.

The studies include

• National Social Life, Health, and Aging Project (NSHAP)
• National Health and Aging Trends Study (NHATS)

https://harmonize.icpsr.umich.edu/

Finnish National Elections Study series

The FNESdata longitudinal survey metadata portal contains the metadata of four surveys in the Finnish National Elections Study series. Studies range from 2003 to 2015.

http://www.fsd.uta.fi/fnesdata

National Health and Aging Trends Study

The United State's National Health and Aging Trends Study (NHATS) gathers information on a nationally representative sample of Medicare beneficiaries ages 65 and older.

https://nhats.colectica.org