Dutch–Flemish translation and validation of the gastrointestinal symptom scales from the patient‑reported outcomes measurement information system (PROMIS)®

Abstract Purpose To translate the eight PROMIS ® GastrointestinaI Symptom Scales into Dutch–Flemish and to evaluate their psychometric properties. Methods This study consisted of two parts: (1) translation according to the Functional Assessment of Chronic Illness Therapy (FACIT) translation methodology and (2) evaluation of psychometric properties: structural validity, using confirmatory factor analysis; and construct validity using hypothesis testing. Results In the first part of the study, in 19 out of the 77 items (24.7%) translation was challenging. After discussion between the translators... Mehr ...