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

Abstract

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 < 0.001 and r = 0.55). The face validity was acceptable according to the opinion of 10 participants. To determine the CVI and the CVR, 10 experts' panels reviewed all items related to the questionnaire in terms of necessity, clarity, transparency, and relevancy. Based on the expert panel all NBSS criteria got a high score, and all criteria were essential to assess NLUTD (CVI: 0.78–1). Conclusions Regarding validity and reliability, the Persian version NBSS questionnaire can properly evaluate NLUTD in MS or stroke/CVA patients.

Clinical tools for evaluating the severity of overactive bladder: A systematic review of psychometric properties

“…The Cronbach's alpha scores for assessing internal consistency reported by most of the included studies were of good to excellent correlation, only few studies were within the acceptable threshold ( α = 0.70). 36,42,45,46,49,53,61 The intra-class correlations for evaluating the test–retest reliability for most included studies were within the acceptable threshold ( α = 0.70). 28,32,33,42,49,55,56 Among the identified clinical tools, Overactive Bladder Symptom Score, Overactive Bladder Questionnaire and Neurogenic Bladder Symptom Score tend to have good to excellent internal consistency, test–retest reliability, validity and responsiveness.…”