0839 Does CBT-I Dose Improve Depression and Anxiety in Patients Diagnosed with Breast and Prostate Cancer?

Introduction It has been widely reported in the literature that insomnia, depression, and anxiety are reciprocally related, and that CBT-I not only improves insomnia but also symptoms of depression and anxiety. With respect to cancer, patients of-ten report high co-morbidity of insomnia, fatigue, depression, and anxiety, with fatigue occurring in almost all patients diagnosed with cancer (irrespective of diagnoses and staging) and extending well into survivorship. The underlying mechanisms of fatigue are not well understood and, as such, there could be many contributing factors (e.g., insomnia and mood disturbance). The present analysis is based on a pilot study evaluating whether sleep continuity and CRF is improved by CBT-I dose (4 & 8 [Low dose] vs 10 & 12 [High dose] sessions). The present analysis evaluates whether dose of CBT-I effects depression and anxiety in patients diagnosed with breast and prostate cancer. Methods This descriptive analysis (percent change from pre to post treatment) includes 12 adult subjects (83.3% female, Mage 58.4±7.5yrs.; [Low dose, n=6], [High dose, n=6]). CBT-I was provided by a master therapist via video conferencing (telehealth CBT-I). Subjects were asked to complete sleep diaries and weekly measures of fatigue (FACIT), insomnia severity (ISI), depression (PHQ-9), and anxiety (GAD-7). Results On the PHQ-9, subjects in the Low dose group exhibited a 57% improvement and subjects in the High dose group had a 52% improvement. On the GAD-7, this corresponded to a 26% improvement (High dose group) and 25% improvement. Conclusion As increasingly reported in the literature, CBT-I produced robust effects on depression as assessed by the PHQ-9. The effects on anxiety appear to be less robust. This may be the case because CBT-I’s effects on fatigue are likely to impact a variety of depressive symptoms, where this is less the case for anxiety. Analyses are ongoing, where the relative effects will be adjusted for insomnia-related items and rendered in terms of effect sizes. Support (if any) 5T32HL00795320;K24AG055602