A Message for Our Participants

Dear Participant,

On behalf of the Millennium Cohort Study team, I would like to take this opportunity to express our gratitude for your continued dedication to this important study. Whether you are new to the cohort or a longstanding participant, we are honored and humbled by your service to our country.

We commemorated the 20-year anniversary of the Millennium Cohort Study in 2021. In 2001, 77,000 service members answered the call and volunteered to join the first enrollment panel of the study, many of whom subsequently deployed following the events of 9/11. Two decades later, the study has become the largest and longest-running cohort in military history. Spanning multiple generations, there are now more than a quarter of a million enrolled participants from all service branches, components, and pay grades. Your active participation as well as the contributions of your fellow current and former service members have generated approximately 150 reports and scientific publications on the health and well-being of the Force. This success of the Millennium Cohort Study would not have been possible without you.

Thank you again for your service and for your continued commitment to this study.


Very respectfully,

Signature for Rudy Rull

Rudy Rull, PhD, MPH
Principal Investigator
Millennium Cohort Study