Functional Assessment of Cancer Therapy-Breast (FACT-B)

The FACT-B is a comprehensive 36-item disease-specific quality-of-life instrument that integrates the generic FACT-G (27 items covering physical, social, emotional, and functional well-being) with a 9-item breast-cancer-specific subscale addressing body image, sexual function, arm symptoms, and treatment side effects. Developed by Brady et al. in 1997, the FACT-B is the gold-standard QoL measure for breast cancer research and clinical practice, used in hundreds of clinical trials and enabling comparison across breast cancer populations and treatment modalities.