This study investigated the impact of the establishment and application of the "health care-family-environment" linkage mechanism on the level of migration stress, coping styles and care satisfaction of families of patients transferred from the EICU, in order to provide a reference for improving the physical and psychological health of families and to promote the role of family members in the social support of patients transferred out of this category.

Inclusion Criteria:

1. Family members of trauma patients scheduled to be transferred from the EICU to a general unit within 24h;
2. Family members of patients aged ≥ 18 years;
3. Family members who are responsible for the main care tasks and medical decisions of the patient during hospitalisation;
4. Family members of patients with clear language and good communication skills;
5. Families of patients who volunteered to participate in this study.

Exclusion Criteria:

1. Family members of patients temporarily transferred out of the EICU or temporarily discharged from trauma
2. Families of patients who voluntarily request termination of treatment;
3. Family members of patients with cognitive impairment, speech impairment or mental abnormalities.