{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,24]],"date-time":"2026-01-24T16:42:04Z","timestamp":1769272924676,"version":"3.49.0"},"reference-count":26,"publisher":"Oxford University Press (OUP)","issue":"1-2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,1,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>Service members and veterans remain a challenging population for survey research. As the Millennium Cohort Study is the largest and longest running prospective cohort study in United States military history and has follow-up data collection planned through 2068, it is critical to determine factors that may help bolster participant retention.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and Methods<\/jats:title>\n                    <jats:p>A satisfaction survey was administered in 2023 to obtain feedback for quality improvement efforts. Of the eligible Millennium Cohort Study participants, 27,224 (45%) completed the satisfaction survey. Chi-square tests were used to examine responses stratified by service status (active duty, Reserve\/National Guard, and veterans). Natural language processing was utilized to uncover latent topics from open-text data.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>A majority of respondents (96%) were satisfied with their experience in the study. The main motivations for continued participation included helping fellow service members and veterans (96%) and learning about military health issues (82%). Major topics that emerged in open-ended feedback provided by 25% of the sample included the importance of tracking health outcomes related to military exposures, a desire to help service members and veterans, and a desire to see study results and impacts.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Altruism toward the military community was a key motivation for continued participation and efforts to highlight these values may help to increase study recruitment and retention.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1093\/milmed\/usaf154","type":"journal-article","created":{"date-parts":[[2025,4,10]],"date-time":"2025-04-10T07:33:52Z","timestamp":1744270432000},"page":"e39-e46","source":"Crossref","is-referenced-by-count":0,"title":["Participant Satisfaction and Engagement With a Military Longitudinal Cohort Study: The U.S. Millennium Cohort 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