An international Phase IV field study - psychometric properties of the updated module on assessing quality of life of patients with breast cancer EORTC QLQ-BR42

The revised EORTC QLQ-BR42 questionnaire incorporates the EORTC-QLQ-BR23 original items, combined with 19 new items that address the new therapies developed over the past 20 years. This comprehensive module is a valid instrument to assess the HRQoL of BC patients and can be used in place of the BR23 in future trials.