The Steroid Symptom Questionnaire Multiple Myeloma (SSQ-MM): translation and cross-cultural adaptation into Danish and Norwegian and initial psychometric evaluation of the Norwegian version.

The Steroid Symptom Questionnaire - Multiple Myeloma (SSQ-MM) was developed to assess patient-reported side effects of corticosteroid treatment in multiple myeloma (MM) patients. This study aimed to translate and culturally adapt the SSQ-MM into Danish and Norwegian, and to provide an initial evaluation of the psychometric properties of the Norwegian version. Translation and cultural adaptation followed ISPOR good practice guidelines, including forward-backward translation and cognitive debriefing interviews with patients and clinicians. Psychometric evaluation was conducted in newly diagnosed