Akira Tsunoda1, Kazutaka Yamada2, Masahiro Takano2, Hiroshi Kusanagi3. 1. Department of Gastroenterological Surgery, Kameda Medical Center, 929 Higashicho, Kamogawa City, Chiba, 296-8602, Japan. tsunoda.akira@kameda.jp. 2. Department of Surgery, Coloproctology Center, Takano Hospital, Kumamoto, Japan. 3. Department of Gastroenterological Surgery, Kameda Medical Center, 929 Higashicho, Kamogawa City, Chiba, 296-8602, Japan.
Abstract
PURPOSE: The aim of the present study was to conduct a psychometric evaluation of the patient assessment of constipation quality of life scale (PAC-QOL) in the Japanese language. METHODS: The PAC-QOL was translated into Japanese. After being linguistically validated, the Japanese version of the PAC-QOL was administered to a sample of 121 patients. Validation studies were conducted to evaluate the internal consistency reliability (Cronbach's alpha), reproducibility [intraclass correlation coefficients (ICCs)], the convergent validity (correlated with the Short-Forum 36 Health Survey), the discriminant validity [correlated with the constipation scoring system (CSS)], the cross-sectional validity (analysis of variance models), and responsiveness (effect size) of the PAC-QOL scales. RESULTS: The internal consistency was good for all of the scales (Cronbach's alpha coefficient >0.7) and reproducible (ICCs >0.7). The four scales of the PAC-QOL were significantly correlated with the Short-Forum 36 Health Survey (P < 0.01 except for the satisfaction subscale) and the CSS scores (P < 0.01 except for the satisfaction subscale). The PAC-QOL scale scores were significantly associated with constipation severity (P < 0.05). The effect size in patients reporting improvements in constipation over the treatment period was moderate to large, with a subscale effect size ranging from 0.69 to 1.18 and an overall scale effect size of 1.12. Similar findings were observed in the original validation study. CONCLUSIONS: The linguistic and psychometric evaluation demonstrated the validity of the Japanese version of the PAC-QOL.
PURPOSE: The aim of the present study was to conduct a psychometric evaluation of the patient assessment of constipation quality of life scale (PAC-QOL) in the Japanese language. METHODS: The PAC-QOL was translated into Japanese. After being linguistically validated, the Japanese version of the PAC-QOL was administered to a sample of 121 patients. Validation studies were conducted to evaluate the internal consistency reliability (Cronbach's alpha), reproducibility [intraclass correlation coefficients (ICCs)], the convergent validity (correlated with the Short-Forum 36 Health Survey), the discriminant validity [correlated with the constipation scoring system (CSS)], the cross-sectional validity (analysis of variance models), and responsiveness (effect size) of the PAC-QOL scales. RESULTS: The internal consistency was good for all of the scales (Cronbach's alpha coefficient >0.7) and reproducible (ICCs >0.7). The four scales of the PAC-QOL were significantly correlated with the Short-Forum 36 Health Survey (P < 0.01 except for the satisfaction subscale) and the CSS scores (P < 0.01 except for the satisfaction subscale). The PAC-QOL scale scores were significantly associated with constipation severity (P < 0.05). The effect size in patients reporting improvements in constipation over the treatment period was moderate to large, with a subscale effect size ranging from 0.69 to 1.18 and an overall scale effect size of 1.12. Similar findings were observed in the original validation study. CONCLUSIONS: The linguistic and psychometric evaluation demonstrated the validity of the Japanese version of the PAC-QOL.
Entities:
Keywords:
Constipation; Quality of life; Validation study
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