Depressive symptoms

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3 studies · 2 recommendations

Last updated: February 25, 2026

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Monitor for depression early — it affects over 90% of newly diagnosed breast cancer patients

Depression is exceptionally common and clinically impactful in breast cancer. A cohort study of 502 patients found depression was the strongest predictor of poor sleep quality, with over five-fold increased odds (OR = 5.25, 95% CI 2.01–13.67) at diagnosis. A systematic review of 4 RCTs reported that 91.4% of newly diagnosed cancer patients (within 6 months) experienced depressive symptoms. With 60.2% of patients already suffering poor sleep before treatment begins, unaddressed depression compounds disability throughout the treatment trajectory. Early self-monitoring enables timely access to proven interventions like cognitive behavioral therapy, which the review confirmed effectively reduces depression in breast cancer patients without pharmacological treatment.

Evidence

The Effectiveness of Cognitive Behavioral Therapy (CBT) To Decreased Depression in Woman Patients with Cancer included cervical cancer and breast cancer

Authors: Bakhtiar, Yuriz, Fitriyanti, Dwi, Mardiyono, Mardiyono

Published: July 26, 2019

A systematic review of 4 RCTs found that 91.4% of patients newly diagnosed with cancer (less than 6 months) reported feelings of depression. This extremely high prevalence among newly diagnosed women with breast cancer underscores the importance of self-monitoring for depressive symptoms. The review confirmed that effective non-pharmacological interventions such as CBT exist to treat this depression, making early identification clinically meaningful for timely access to psychotherapy support.

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The impact of breast cancer treatments on sleep quality 1 year after cancer diagnosis

Authors: Costa, AR, Fontes, F, Gonçalves, M, Lunet, N, Pereira, S

Published: January 1, 2017

In a cohort of 502 breast cancer patients, depression was associated with over five-fold increased odds of poor sleep quality at diagnosis (OR = 5.25, 95% CI 2.01 to 13.67). This was the strongest predictor of impaired sleep among all patient characteristics examined. With 60.2% of patients already experiencing poor sleep before treatment, the compounding effect of depression on sleep quality represents a significant contributor to overall disability during and after cancer treatment.

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Monitor for depression after breast cancer treatment as it may affect stress hormones and immunity

Depression after breast cancer diagnosis is common and associated with dysregulated cortisol patterns that may adversely affect immune function and survival. Recognizing depressive symptoms early allows for timely lifestyle or clinical intervention.

Evidence

Effects of an exercise and hypocaloric healthy eating intervention on indices of psychological health status, hypothalamic-pituitary-adrenal axis regulation and immune function after early-stage breast cancer : a randomised controlled trial

Authors: Coleman, R. E., Crank, Helen, Daley, A. J., Mutrie, N., Powers, H. J., Saxton, John, Scott, E. J., Woodroofe, Nicola

Published: January 1, 2014

In a randomized controlled trial of 85 women after early-stage breast cancer treatment, depressive symptoms measured by the BDI-II were prevalent at baseline. The control group (usual care only, n ≈ 42) showed no improvement in depressive symptoms and exhibited abnormal diurnal cortisol patterns at 6-month follow-up, with lower morning cortisol indicating HPA axis dysregulation. Control participants also had elevated total leukocyte, neutrophil, and lymphocyte counts compared to the intervention group (P ≤ 0.05), suggesting ongoing inflammatory responses. The intervention group's significant reduction in depressive symptoms (adjusted mean difference −3.12, P = 0.004) and cortisol normalization (P < 0.04) demonstrate that untreated depression carries measurable physiological consequences.

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