Clinical trial participation as part of end-of-life (EOL) cancer care: Associations with medical care near death and bereaved caregivers’ mental health.
9102 Background: Clinical trial participation is necessary to improve existing therapies, encouraged by national guidelines, and common among advanced cancer patients. The relationships between trial participation and important EOL outcomes such as aggressive care are unknown. Methods: Coping with Cancer Study, an NCI-funded multicenter prospective cohort study of advanced cancer patients and their caregivers, enrolled September 2002 – February 2008. Patients were interviewed at baseline, and clinical trial participation was documented by chart review. Patients were followed to death, (median 4.4 months from baseline). Medical care and quality of life (QOL) in the last week of life was assessed by caregiver interview and chart review. Caregiver interview 6 months post-bereavement assessed QOL and mental health (Structured Clinical Interview for the DSM-IV). The primary outcome was aggressive EOL care (ventilation, resuscitation, or chemotherapy in the last week of life). Secondary outcomes were bereaved caregivers’ mental health and QOL. Propensity-score weighting balanced patient characteristics (e.g. clinical variables, EOL preferences) that differed by trial participation. Propensity-score weighted regression models estimated the effect of trial participation on outcomes. Results: Of 246 patients followed to death with non-missing propensity scores, 27 were clinical trial participants. In propensity-score weighted analyses, trial participation was significantly associated with aggressive EOL care [29.6% v 9.1%; adjusted OR (AOR), 12.14; 95% CI, 3.65-40.36], ICU admission, mechanical ventilation, chemotherapy, and a trend toward inferior QOL near death (p = 0.069). Of 180 matched caregivers, trial participation predicted less mental illness [AOR, 0.15; 95% CI 0.04-0.57], major depression [AOR, 0.25; 95% CI, 0.08-0.80], but was unassociated with QOL (p = 0.15) in adjusted analyses. Conclusions: Clinical trial participation is associated with increased risk of aggressive EOL care for advanced cancer patients, but better mental health for bereaved caregivers.