Reliability and Validity of the Quality of Life Questionnaire in Iranian Patients With Lower Urinary Tract Symptoms Publisher Pubmed



Pourmomeny AA¹ ; Zargham M² ; Fani M¹
Source: LUTS: Lower Urinary Tract Symptoms Published:2018

Abstract

Objectives: The aim of this study is to evaluate the psychometric properties of the Iranian version of the Quality of Life (QoL) questionnaire in patients with urinary incontinence (UI). Methods: The English questionnaire on lower urinary tract symptoms was initially translated into Persian, and then back-translated into English. Final modifications were made after testing the questionnaire on Iranian patients with UI. To validate the translated questionnaire, the following tests were undertaken: content/face validity, internal consistency/reliability and construct validity. Results: The Lower Urinary Tract Symptoms Quality of Life (LUTS–QoL) questionnaire showed good internal consistency, content validity, and criterion validity, as measured by correlation with scores on the Short-Form 36 Health Survey (SF-36). Cronbach's alpha coefficient was 0.951, indicating a high internal consistency. Concerning criterion validity, correlations between the LUTS–QoL and subscales of the SF-36 were 0.563–0.193. The highest correlation was found between the LUTS–QoL and the social function subscale of the SF-36. Conclusion: The Iranian version of the LUTS–QoL questionnaire is a valid and robust instrument that can be used reliably in clinical settings and in research. © 2017 John Wiley & Sons Australia, Ltd