Extended Swedish Adoption Study of Adverse Stress Responses and Posttraumatic Stress Disorder
IMPORTANCE Twin studies have found that posttraumatic stress disorder (PTSD) is influenced by both genetic and environmental factors within a generation. No study has used an adoption design, which can address questions about the degree and sources of cross-generational transmission of adverse stress responses (ASRs) and PTSD. OBJECTIVES To examine whether ASRs or PTSD are transmitted from parents