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Gulf-Era Twin Registry (GET-R)


Investigator Access

What's Available

Check with the study contact and publications for information on a public dataset, data archive, data enclave, or website where data might be available.

Available Documentation

Dates Data are Available

Access Criteria

Study Characteristics


To develop a registry to identify Veterans who may be eligible for future research studies for the purpose of understanding the relationship between genetic and environmental risk factors, military service and combat deployment exposures, and health conditions

Era of Service

  • Gulf War
  • Operation Enduring Freedom (OEF)
  • Operation Iraqi Freedom (OIF)
  • Operation New Dawn (OND)


Veteran twin pairs separated from military service after 2001. Veterans may have served during any conflict including the Gulf War in 1990-1991 or Gulf Wars OEF, OIF, or OND

Study Design

Closed cohort

Time Period





Unconfirmed – enrollment target of 8,600 Veterans/4,300 twin pairs

Response Rate

Unconfirmed – 12,000 Veterans (6,000 twin pairs) invited to participate

Recruitment Method

Using Defense Manpower Data Center (DMDC) files to identify twins with Veteran follow-up for twin-status confirmation



Data Collected

  • Demographics
  • Experience as a twin
  • Physical and mental health
  • Alcohol and tobacco use
  • Military experiences

Data Collection Methods 

Questionnaire - either online, on paper, or by telephone

Funding Source

Department of Veterans Affairs (VA)


Principal Investigator: Aaron Schneiderman, PhD, MPH
Principal Investigator: Stephanie Eber, MPH
Principal Investigator: Shanna Smith, MPH


(202) 266-4695 or 1-800-211-5272

Selected Publication


More Information

Study website