Assessing Depressive Symptoms in Patients With Cancer Treated With Interleukin-2: A Comparison of 2 Measures

High-dose interleukin-2 is a therapy available for individuals with renal cell carcinoma; however, it can produce adverse effects, specifically depressive symptoms. There is limited information regarding the trajectory of depressive symptoms and measurement-based care assessment of depressive symptoms.

The purpose was to describe the trajectory of depressive symptoms and compare 2 depression measures.

A descriptive, mixed-method case study approach was used to describe the longitudinal trajectory of depressive symptoms The qualitative assessment included a journal entry and an interview. The quantitative depression symptom severity measures included the 8-item self-report Patient-Reported Outcomes Measurement Information System Depression and the 30-item Inventory of Depressive Symptomatology-Clinician Rated (IDS-C).

Ten cases were enrolled. The maximum number of interleukin-2 doses that any patient received within a single hospitalization ranged from 4 to 12. Mean scores on the 8-item Patient-Reported Outcomes Measurement Information System Depression showed no changes in depressive symptoms from pretreatment to posttreatment, nor across hospitalizations. Mean total scores on the IDS-C increased from "normal" to "mild severity" depressive symptom range across all treatment cycles, suggesting transient depressive symptoms within hospitalizations. Qualitative data from the case supported the IDS-C increase, suggesting that the patient developed depressive symptoms pretreatment to posttreatment.

Understanding the trajectory of depressive symptoms allows for the identification of critical time points when depressive symptoms present and change across treatment. It is critical to use measurement-based care using validated measures to assess for the presence and changes in depressive symptoms.

Validated self-report or clinician-rated depression symptom measures should be used to document the presence or absence of depressive symptoms in this population.