Preloss grief in family caregivers during end-of-life cancer care: A nationwide population-based cohort study.

Severe preloss grief symptoms were significantly associated with distress, low preparedness, and little communication during caregiving. Thus, severe preloss grief symptoms may be a key indicator for complications in caregivers of cancer patients in an end-of-life trajectory. Targeted interventions are needed to support family caregivers with severe preloss grief symptoms. Development of preloss grief assessment tools and interventions should be a priority target in future research.