Edmond P H Choi1, Cindy L K Lam, Weng-Yee Chin. 1. Department of Family Medicine and Primary Care, The University of Hong Kong, 3/F., 161 Main Street, Ap Lei Chau Clinic, Ap Lei Chau, Hong Kong, h0714919@hku.hk.
Abstract
AIM AND OBJECTIVES: The aim of this study was to extend the scope of application of the Incontinence Impact Questionnaire-7 (IIQ-7) with the objective of assessing the applicability, validity, reliability and sensitivity of the IIQ-7 in both Chinese males and females with lower urinary tract symptoms (LUTS). METHODS: The validity, reliability and sensitivity were assessed in 233 patients who were recruited in Hong Kong primary-care settings. The internal construct validity was assessed by corrected item-total correlation. The convergent validity was assessed using Pearson's correlation test against International Prostate Symptom Score (IPSS) quality-of-life question and Short Form 12, version 2 (SF-12v2). The reliability was assessed by the internal consistency (Cronbach's alpha coefficient) and 2-week test-retest reliability (intraclass correlation coefficient and paired t test). The sensitivity was determined by performing known group comparisons by independent t test. RESULTS: Corrected item-total correlations were ≥0.4 for all items in males and females. Overall, the IIQ-7 total score had a stronger correlation with IPSS quality-of-life score than the SF-12v2. The IIQ-7 showed good internal consistency (Cronbach's alpha coefficient >0.7) and good test-retest reliability (ICC > 0.8, paired t test p value >0.05). The IIQ-7 was more sensitive than the SF-12v2 to detect differences among patients with different levels of symptom severity. CONCLUSIONS: The IIQ-7 Chinese version appears to be a valid and reliable measure to assess Cantonese-speaking males and females with LUTS. The IIQ-7 is more sensitive than generic health-related quality-of-life measures to detect differences between groups.
AIM AND OBJECTIVES: The aim of this study was to extend the scope of application of the Incontinence Impact Questionnaire-7 (IIQ-7) with the objective of assessing the applicability, validity, reliability and sensitivity of the IIQ-7 in both Chinese males and females with lower urinary tract symptoms (LUTS). METHODS: The validity, reliability and sensitivity were assessed in 233 patients who were recruited in Hong Kong primary-care settings. The internal construct validity was assessed by corrected item-total correlation. The convergent validity was assessed using Pearson's correlation test against International Prostate Symptom Score (IPSS) quality-of-life question and Short Form 12, version 2 (SF-12v2). The reliability was assessed by the internal consistency (Cronbach's alpha coefficient) and 2-week test-retest reliability (intraclass correlation coefficient and paired t test). The sensitivity was determined by performing known group comparisons by independent t test. RESULTS: Corrected item-total correlations were ≥0.4 for all items in males and females. Overall, the IIQ-7 total score had a stronger correlation with IPSS quality-of-life score than the SF-12v2. The IIQ-7 showed good internal consistency (Cronbach's alpha coefficient >0.7) and good test-retest reliability (ICC > 0.8, paired t test p value >0.05). The IIQ-7 was more sensitive than the SF-12v2 to detect differences among patients with different levels of symptom severity. CONCLUSIONS: The IIQ-7 Chinese version appears to be a valid and reliable measure to assess Cantonese-speaking males and females with LUTS. The IIQ-7 is more sensitive than generic health-related quality-of-life measures to detect differences between groups.
Authors: Chris C Sexton; Karin S Coyne; Zoe S Kopp; Debra E Irwin; Ian Milsom; Lalitha P Aiyer; Andrea Tubaro; Christopher R Chapple; Alan J Wein Journal: BJU Int Date: 2009-04 Impact factor: 5.588
Authors: Edmond P H Choi; Carlos K H Wong; Eric Y F Wan; James H L Tsu; W Y Chin; Kenny Kung; M K Yiu Journal: Qual Life Res Date: 2016-02-23 Impact factor: 4.147
Authors: Edmond P H Choi; Weng-Yee Chin; Cindy L K Lam; Eric Y F Wan; Anca K C Chan; Karina H Y Chan Journal: PLoS One Date: 2015-06-15 Impact factor: 3.240
Authors: Julie Y Chen; Edmond P H Choi; Eric Y F Wan; Anca K C Chan; Joyce P Y Tsang; Karina H Y Chan; W K Lo; S L Lui; W L Chu; Cindy L K Lam Journal: PLoS One Date: 2016-05-05 Impact factor: 3.240