Development and validation of the International Consultation on Incontinence Modular Questionnaire for Male Lower Urinary Tract Symptoms (ICIQ-MLUTS) and the ICIQ-MLUTS Long Form in Chinese population.

Objective: The aim of this study was to develop and validate Chinese versions of the International Consultation on Incontinence Modular Questionnaire for Male Lower Urinary Tract Symptoms (ICIQ-MLUTS) and ICIQ-MLUTS Long Form (LF), and to discuss their potential functions.

Methods: The original ICIQ-MLUTS and ICIQ-MLUTS LF were translated into Chinese after obtaining permission from the International Consultation on Incontinence Modular Questionnaire Advisory Board. Between November 2017 and August 2018, the Chinese versions of the ICIQ-MLUTS and ICIQ-MLUTS LF were validated by administering them to male patients with lower urinary tract symptoms attending the urology department in 6 and 12 hospitals, respectively, in China.

Results: In all, 135 and 230 patients completed the first administration of the Chinese version of the ICIQ-MLUTS and ICIQ-MLUTS LF, respectively. Both questionnaires had good internal consistency (Cronbach's α = 0.797 and 0.853 for the ICIQ-MLUTS and ICIQ-MLUTS LF, respectively) and good criterion validity (Pearson's correlation of 0.846 and 0.833 with the International Prostate Symptom Score for the ICIQ-MLUTS and ICIQ-MLUTS LF, respectively). Satisfactory test-retest reliability was demonstrated, with an intraclass correlation coefficient for both questionnaires >0.9. Good responsiveness of both questionnaires was also noticeable (marked improvements between scores before and after treatment; P < 0.001 for both).

Conclusions: The Chinese versions of the ICIQ-MLUTS and ICIQ-MLUTS LF were valid and reliable in Chinese population, which will be useful for clinical practice and research in China.