Developing the First Validity of Shared Medical Decision-Making Questionnaire in Taiwan

Chi-Chang Chang

Developing the First Validity of Shared Medical Decision-Making Questionnaire in Taiwan

Chi-Chang Chang * §

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Chung Shan Medical University

Developing the First Validity of Shared Medical Decision-Making Questionnaire in Taiwan

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Abstract

Due to a lack of valid Taiwanese instruments measuring Shared Medical Decision-making (SMDM) in Taiwan. The purpose of the study is to investigate the reliability and validity of the Shared Medical Decision-making process. Total 350 patients were randomly recruited from a medical centre in Taiwan. As a theoretical basis steps of the SMDM process were defined in an expert panel. Item formulation was then conducted according to the Delphi method and a pool of 16 items was constructed. In addition, the Winstep software was used to examine whether the data fit Rasch test model. Items with outfit or infit MNSQs (mean square errors) not in the range between 0.77 and 1.30 are usually deemed as potential misfits. Successive Rasch analyses were performed until a final set of items was obtained. After eliminating 1 item the remaining 15 form a unidimensional scale with an acceptable reliability for person measures 0.77 and very good reliability for item difficulties 0.97. Analysis of subgroups revealed a different use of items in different conditions. Taiwanese Shared Medical Decision-making Questionnaire (SMDMQ) is a 15 items normative instrument. In addition, a theory-driven instrument to measure the process of SMDM has been developed and validated by use of a rigorous method revealing first promising results. Yet the ceiling effects require the addition of more discriminating items, and the different use of items in different conditions demands an in depth analysis.

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Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

Not applicable for this article.

How to Cite This Article

Chi-Chang Chang. 2014. "Developing the First Validity of Shared Medical Decision-Making Questionnaire in Taiwan". Global Journal of Medical Research, Global Journal of Medical Research - K: Interdisciplinary GJMR-K Volume 14 (GJMR Volume 14 Issue K2).

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GJMR Volume 14 Issue K2

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Journal Specifications

Crossref Journal DOI 10.17406/gjmr

Print ISSN 0975-5888

e-ISSN 2249-4618

Keywords

rasch test model reliability shared medical decision-making validity

Classification

GJMR-K Classification NLMC Code: W 32.5

Submission ReceivedDecember 9, 2013
Peer Review Double Blind
Handling Editor
Accepted January 5, 2014
Published January 15, 2014

Version of record

v1.2

Issue date

August 5, 2014

Language

English

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Article Matrices

Total Score: 181

Country: Taiwan

Subject: Global Journal of Medical Research

Authors: Chi-Chang Chang (PhD/Dr. count: 0)

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