Psychometric properties of the Persian version of neurogenic bladder symptom score questionnaire: A methodological study on patients with multiple sclerosis and stroke

Objectives Concerning the impact of neurogenic lower urinary tract dysfunction (NLUTD) on quality of life, besides the lack of standard psychometrically‐analyzed Persian tools, the present study investigated the validity and reliability of the Persian version of the neurogenic bladder symptom score (NBSS) questionnaire. Methods A total of 279 multiple sclerosis (MS) or stroke/cerebrovascular accident (CVA) patients over 18 years of age with NLUTD referred to the neurology clinics entered the study in 2021–2022. After translation, back‐translation, and developing a Persian version, its validity and reliability were determined. The content validity index (CVI) and content validity ratio (CVR) were calculated quantitatively. To determine the internal consistency and scale reliability, a test–retest was used. Results The Cronbach's α coefficient was 0.83 and the intraclass correlation coefficient (95% confidence interval) was 0.85 (0.82, 0.88). Cronbach's α in all domains (incontinence, storage and voiding, and consequence) was greater than 0.70. The criterion validity also showed a positive correlation of NBSS with the International Consultation on Incontinence Questionnaire‐overactive bladder (p