Depression Screening and Treatment
Given the negative consequences of comorbid mental illness, professional oncology societies have started developing guidelines regarding the assessments and care of patients with cancer who are experiencing symptoms of depression and/or anxiety.11,28,29 Among these, the American Society of Clinical Oncology (ASCO) has adapted the Pan-Canadian Practice Guideline on Screening, Assessment, and Care of Psychosocial Distress (Depression, Anxiety) in Adults With Cancer.28 Per ASCO, the target audience for these guidelines is health care providers (eg, medical, surgical, and radiation oncologists; psychiatrists; psychologists; primary care providers; nurses; and others involved in the delivery of care for adults with cancer) as well as patients with cancer and their family members and caregivers.28 These guidelines address the optimum screening, assessment, and psychosocial-supportive care interventions for adults with cancer who are identified as experiencing symptoms of depression. Among the most imperative recommendations are periodic assessments across the trajectory of cancer care, including after cure, as well as employing institutional and community resources for depression treatment.
In clinical practice in a VA setting, implementing these guidelines might involve various interventions. First, it is vital for providers to conduct depression screening during periodic health care encounters. Given the high prevalence of depression in patients with lung cancer, we suggest using the 9-item Patient Health Questionnaire (PHQ-9) as an initial screening tool.30 Unlike the abridged 2-item PHQ-2 commonly used in the VA, the PHQ-9 provides an assessment of the full range of depressive symptoms. An elevated PHQ-9 score (≥ 10) is consistent with a major depressive episode and should trigger next steps.30
Once clinically significant depression is identified, initiation of treatment should occur next. The VA is well suited to assist and support non-mental health clinicians—particularly primary care—in treatment initiation and monitoring. This model of partnership is frequently called collaborative care, or integrated care, and it is well positioned to help patients with lung cancer with concomitant depression. In the VA, this model of care is called primary care-mental healthintegration (PC-MHI). One PC-MHI resource is called TIDES (Translating Initiatives for Depression into Effective Solutions), and when a patient is referred, a mental health nurse care manager helps to track the patients’ antidepressant adherence and treatment response while reporting results to primary care clinicians, who are generally responsible for initiating and continuing the antidepressant prescription. For patients preferring nonpharmacologic approaches or for whom an antidepressant may be contraindicated, PC-MHI can provide other assistance. For example, psychologists working in PC-MHI are equipped to provide a brief course of cognitive behavioral therapy sessions, another first-line, evidence-based treatment for clinical depression.
Clinician follow-up to ensure patient adherence, response, and satisfaction, and to adjust treatment as needed is essential. Besides ongoing coordination with PC-MHI services, including mental health clinicians as part of multidisciplinary cancer clinics could offer substantial added value to patients’ comprehensive cancer care. Indeed, the initiation of multicomponent depression care has been shown to improve QOL and role functioning in patients with cancer.31 Besides the established benefits on QOL, patients with lung cancer who achieve depression symptom remission also may enjoy a significant survival benefit over patients whose depression symptoms remain untreated during lung cancer treatment as our study suggests.3
Conclusion
Depression is a common comorbid disease among patients with lung cancer with important negative implications for QOL and survival. When it occurs after a cancer diagnosis, depression is expected to impact all phases of a patient’s life through treatment and survivorshi —ultimately affecting long-term survival. Veterans may be at particularly high risk given the increased prevalence of mental illness, including depression and PTSD in this group compared with that of the general population. Early detection and prompt treatment can promote depression remission, prevent relapse, and reduce the eventual emotional and financial burden of the disease. This approach may ultimately diminish the prevalence and persistence of depression symptoms and decrease the associated negative effects of this disease on patients with lung cancer.
The importance of integrated systems of depression treatment for patients with cancer as part of comprehensive cancer care cannot be overstated. Development and implementation of these systems should be a priority of lung cancer clinicians and treatment centers. The integrated system within the VA is well positioned to be a leader in this area, and VA clinicians who care for patients with lung cancer are encouraged to take advantage of available mental health resources. Additional research is urgently needed to explore optimal implementation of depression screening and subsequent treatment delivery to improve cancer patient outcomes in VA and non-VA health care settings.
