Adolescents and Young Adults (AYAs) with cancer experience symptoms related to disease and treatment. To manage these symptoms, they need to develop self-management behaviors, yet no tool exists to assess these behaviors. The Symptom Self-Management Behaviors Tool (SSMBT) was developed to meet this need.

The study consisted of 2 phases. Phase 1 evaluated content validity, and Phase 2 evaluated reliability and validity. The SSMBT initially contained 14 items with 2 dimensions: (1) behaviors used to Manage Symptoms and (2) behaviors used to communicate with providers regarding symptoms. Four oncology professionals and 5 AYAs with cancer assessed the content validity. Evaluation of reliability and validity involved 61 AYAs with cancer. Reliability was evaluated using Cronbach’s alpha. Construct validity was assessed with factor analysis. Discriminant validity was assessed using associations with symptom severity and distress.

Content validity evaluation supported the importance of the items. Factor analysis supported a two-factor structure: Manage Symptoms (8 items) and Communicate with Healthcare Providers (4 items) subscales. Internal consistency reliability for the total SSMBT was acceptable with Cronbach’s alpha = 0.74. Cronbach’s alpha value for the Manage Symptoms subscale was α = 0.69 and for the Communicate with Healthcare Providers subscale was α = 0.78. The SSMBT total and the Manage Symptoms subscale scores were moderately correlated with symptom severity (r = 0.35, p = 0.014; r = 0.44, p = 0.002, respectively), partially supporting discriminant validity.

Systematic assessment of behaviors AYAs use is critical for clinical practice and evaluate interventions to improve self-management. The SSMBT demonstrates initial reliability and validity but requires further evaluation for clinical interpretation and future use.