The Chinese Quality Of Life Instrument: Development Of A New Health-Related Quality Of Life Instrument Using Factor Analysis And Structural Equation Modeling

Zhao, Li; Chan, Kelvin; Leung, Kwok-fai; Liu, Fengbin; Lang, J; Fang, Jianming

doi:10.2202/1553-3840.1002

Cited by 1 publication

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“…The first subcolumn ("by item") pertains to a clustering applied item by item; the second ("by Facet") to a clustering where all the items within one Facet are considered at the same time. The latter analysis is legitimated by previously reported Factor Analysis results [ 2 , 3 ], which identify a single factor for each ChQoL Facet. Grouping into Facets tends to decrease the number of clusters, except for Facets "Appetite & Digestion" and "Spirit of the Eyes".…”

Section: Resultsmentioning

confidence: 92%

“…The questionnaire comprised 50 items, subdivided into 13 "Facets"; the Facets were grouped into 3 "Domains", namely "Physical Form", "Vitality & Spirit", "Emotion". Furthermore, this structure was built from scratch directly on TCM theoretical considerations, and then validated using Factor Analysis and Structural Equation Modeling [ 2 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

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The ChQoL questionnaire: an Italian translation with preliminary psychometric results for female oncological patients

Aschero

Fenoglio

Vidili

et al. 2010

Health and Quality of Life Outcomes

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Backgroundin Occidental languages, no widely accepted questionnaire is available which deals with health related quality of life from the specific point of view of Traditional Chinese Medicine (TCM). Some psychometric tools of this kind are available in Chinese. One of them is the Chinese Quality of Life questionnaire (ChQoL). It comprises 50 items, subdivided in 3 Domains and 13 Facets. The ChQoL was built from scratch on the basis of TCM theory. It is therefore specifically valuable for the TCM practitioner. This paper describes our translation into Italian of the ChQoL, its first application to Occidental oncological patients, and some of its psychometric properties.Methodsa translation scheme, originally inspired by the TRAPD procedure, is developed. This scheme focuses on comprehensibility and clinical usefulness more than on linguistic issues alone. The translated questionnaire is tested on a sample of 203 consecutive female patients with breast cancer. Shapiro-Wilk normality tests, Fligner-Killeen median tests, exploratory Two-step Cluster Analysis, and Tukey's test for non-additivity are applied to study the outcomes.Resultsan Italian translation is proposed. It retains the TCM characteristics of the original ChQoL, it is intelligible to Occidental patients who have no previous knowledge of TCM, and it is useful for daily clinical practice. The score distribution is not Normal, and there are floor and ceiling effects. A Visual Analogue Scale is identified as a suitable choice. A 3-point Likert scale can also efficiently describe the data pattern. The original scales show non-additivity, but an Anscombe-Tukey transformation with γ = 1.5 recovers additivity at the Domain level. Additivity is enhanced if different γ are adopted for different Facets, except in one case.Conclusionsthe translated questionnaire can be adopted both as a filing system based on TCM and as a source of outcomes for clinical trials. A Visual Analogue Scale is recommended, but a simpler 3-point Likert scale also suitably fits data. When estimating missing data, and when grouping items within Domain in order to build a summary Domain index, an Anscombe-Tukey transformation should be applied to the raw scores.

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Section: Resultsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%