A new tool to investigate anorectal disorders in patients with multiple sclerosis: STAR-Q

Prog Urol. 2023 Jul;33(7):362-369. doi: 10.1016/j.purol.2023.02.006. Epub 2023 Mar 9.

Abstract

Background: Bowel symptoms are commonly experienced by patients with Multiple sclerosis (PwMS), but no specific questionnaire validated in this population allows a rigorous assessment.

Objective: Validation of a multidimensional questionnaire assessing bowel disorders in PwMS.

Methods: A prospective, multicenter study was conducted between April 2020 and April 2021. The STAR-Q (Symptoms' assessmenT of AnoRectal dysfunction Questionnaire), was built in 3 steps. First, literature review and qualitative interviews were performed to create the first version, discussed with a panel of experts. Then, a pilot study assessed comprehension, acceptation and pertinence of items. Finally, the validation study was designed to measure content validity, internal consistency reliability (alpha coefficient of Cronbach) and test-retest reliability [intraclass correlation coefficient (ICC)]. The primary outcome was good psychometric properties with Cronbach's α>0.7 and ICC>0.7.

Results: We included 231 PwMS. Comprehension, acceptation and pertinence were good. STAR-Q showed a very good internal consistency reliability (Cronbach's α=0.84) and test-retest reliability (ICC=0.89). Final version of STAR-Q was composed of 3 domains corresponding in symptoms (Q1-Q14), treatment and constraints (Q15-Q18) and impact on quality of life (Q19). Three categories of severity were determined (STAR-Q≤16: minor, between 17 and 20: moderate, and≥21: severe).

Conclusions: STAR-Q presents very good psychometric properties and allows a multidimensional assessment of bowel disorders in PwMS.

Keywords: Bowel dysfunction; Multiple sclerosis; Quality of life; Qualité de vie; Questionnaire; Sclérose en plaques; Troubles anorectaux.

Publication types

  • Multicenter Study

MeSH terms

  • Humans
  • Multiple Sclerosis* / complications
  • Multiple Sclerosis* / diagnosis
  • Pilot Projects
  • Prospective Studies
  • Psychometrics / methods
  • Quality of Life
  • Rectal Diseases*
  • Reproducibility of Results
  • Surveys and Questionnaires