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Open Access Short report

The Chinese version of the Myocardial Infarction Dimensional Assessment Scale (MIDAS): Mokken scaling

Roger Watson12, Wenru Wang3, Chantal F Ski4* and David R Thompson4

Author Affiliations

1 School of Nursing & Midwifery, University of Sheffield, Sheffield, UK

2 School of Nursing & Midwifery, University of Western Sydney, Sydney, Australia

3 Alice Lee Centre for Nursing Studies, National University of Singapore, Singapore

4 Cardiovascular Research Centre, Australian Catholic University, Melbourne, Australia

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Health and Quality of Life Outcomes 2012, 10:2  doi:10.1186/1477-7525-10-2

Published: 5 January 2012

Abstract

Background

Hierarchical scales are very useful in clinical practice due to their ability to discriminate precisely between individuals, and the original English version of the Myocardial Infarction Dimensional Assessment Scale has been shown to contain a hierarchy of items. The purpose of this study was to analyse a Mandarin Chinese translation of the Myocardial Infarction Dimensional Assessment Scale for a hierarchy of items according to the criteria of Mokken scaling. Data from 180 Chinese participants who completed the Chinese translation of the Myocardial Infarction Dimensional Assessment Scale were analysed using the Mokken Scaling Procedure and the 'R' statistical programme using the diagnostics available in these programmes. Correlation between Mandarin Chinese items and a Chinese translation of the Short Form (36) Health Survey was also analysed.

Findings

Fifteen items from the Mandarin Chinese Myocardial Infarction Dimensional Assessment Scale were retained in a strong and reliable Mokken scale; invariant item ordering was not evident and the Mokken scaled items of the Chinese Myocardial Infarction Dimensional Assessment Scale correlated with the Short Form (36) Health Survey.

Conclusions

Items from the Mandarin Chinese Myocardial Infarction Dimensional Assessment Scale form a Mokken scale and this offers further insight into how the items of the Myocardial Infarction Dimensional Assessment Scale relate to the measurement of health-related quality of life people with a myocardial infarction.

Keywords:
cardiac rehabilitation; quality of life; psychometrics; Mokken scaling; Myocardial Infarction Dimensional Assessment Scale