Background: The recent policy of deinstitutionalization of health care in Western countries has resulted in a growing number of people - including elderly - with severe mental illness living in the community where they rely on families and others for support in daily living. Caregiving for partners, parents, children, and significant others can be a stressful experience and has been associated with psychosocial problems and poorer physical health. To support caregivers, a new, complex, nurse-led caregiver - centered intervention was developed.