This study investigated the effectiveness of a structured telephone intervention for caregivers of people diagnosed with poor prognosis gastrointestinal cancer to improve psychosocial outcomes for both caregivers and patients. Caregivers of patients starting treatment for upper gastrointestinal or Dukes D colorectal cancer were randomly assigned (1:1) to the Family Connect telephone intervention or usual care. Caregivers in the intervention group received four standardized telephone calls in the 10 weeks following patient hospital discharge.