This study aimed to examine the feasibility and preliminary effectiveness of a behavioral activation (BA) program for the bereaved of cancer patients toward reducing depressive symptoms.

The BA program for the bereaved was a partially modified version for cancer patients. This program encompassed a preinterview and seven 50-minute sessions every 1–2 weeks, using worksheets, with homework assignments each day. To examine feasibility, the completion rates of intervention and 3 months of follow-up were examined. To examine the preliminary effectiveness, psychological symptoms were assessed with the Patient Health Questionnaire (PHQ-9; primary outcome) and Beck Depression Inventory-II (BDI-II) for depression and the Generalized Anxiety Disorder-7 (GAD-7) for anxiety. These were evaluated 3 times: before, immediately after, and 3-month post-intervention. Non-parametric tests were used for comparison of scores at 3 time points and calculation of effect size.

Of the 42 bereaved who were contacted, 21 were eligible and 20 were participated, while 19 and 18 were in the completed intervention and completed 3-month post-intervention categories (intervention completion rate was 95% and follow-up completion rate was 90%). PHQ-9, BDI-II, and GAD-7 showed significant reductions immediately and 3 months after the intervention compared to pre-intervention, and the effect sizes were all large after 3 months, although they were less than immediately after (PHQ-9: 0.89, 0.71; BDI-II: 0.88, 0.67; GAD-7: 0.57, 0.53).

This study indicated that the BA program for the bereaved of cancer patients was feasible and effective vis-à-vis reducing depressive symptoms.