in the service or their marital status changes. The questionnaire asks participants about their mental and physical health, the quality of their marital and family relationships, their deployment and reunion experiences, their perception of how their spouse is coping, and the effects of military life and deployment on their children. Participation in the Family Study is completely voluntary. References Further reading External links Official Millennium Cohort Family Study website Millennium Cohort Family Study Publications Millennium Cohort Family Study Endorsements Naval Health Research Center Epidemiological study projects Cohort studies