Background Prior studies show that family caregiver factors influence patient outcomes. The purpose of this analysis was to determine the association between family caregiver self-rated health, perception of preparedness and burden at the time of patient admission to home palliative care (HomePal) with downstream patient hospital utilisation and time to hospice enrolment and death.

Methods Data for this cohort study (n=441) were drawn from a trial testing two models of HomePal. Caregiver self-rated health, preparedness (Preparedness for Caregiving Scale, CPS) and burden (Zarit-12) were measured at admission to HomePal. Caregivers were categorised as having good/very good/excellent or fair/poor health, scoring above or below the CPS median score (23), or having no/mild (0–10), moderate (11-20) or high (>20) burden. Proportional hazard competing risk models assessed the association between caregiver factors with hospital utilisation (emergency department visits, observation and inpatient stays).

Results Patients whose caregivers reported poor health and low preparedness received more visits by home health aides and social workers, respectively (both, p<0.05). Adjusted models showed that worse caregiver health (HR: 0.69 (95% CI 0.52 to 0.92), p=0.01), low preparedness (HR: 0.73 (95% CI 0.57 to 0.94), p=0.01) and high burden (HR: 0.77 (95% CI 0.56 to 1.06), p=0.10) were associated with lower risk for hospital utilisation. There were no significant associations between caregiver factors with time to patient enrolment in hospice or death in adjusted models (both, p>0.05).

Conclusion Prospective studies are needed to understand how greater in-home supports for family caregivers with poor health could help achieve quality palliative care that aligns with families’ priorities.

Trial registration number NCT03694431; ClinicalTrials.gov.