Linguistic validation of stigmatisation degree, self-esteem and knowledge questionnaire among asthma patients using Rasch analysis

ABSTRACT

Background and Objective: The stigmatisation degree, self-esteem and knowledge either directly or indirectly influence the control and self-management of asthma. To date, there is no valid and reliable instrument that can assess these key issues collectively. The main aim of this study was to test the reliability and validity of the newly devised and translated “Stigmatisation Degree, Self-Esteem and Knowledge Questionnaire” among adult asthma patients using the Rasch measurement model. Methodology: This cross-sectional study recruited thirty adult asthma patients from two respiratory specialist clinics in Selangor, Malaysia. The newly devised self-administered questionnaire was adapted from relevant publications and translated into the Malay language using international standard translation guidelines. Content and face validation was done. The data were extracted and analysed for real item reliability and construct validation using the Rasch model. Results and Conclusion: The translated “Stigmatisation Degree, Self-Esteem and Knowledge Questionnaire” showed high real item reliability values of 0.90, 0.86 and 0.89 for stigmatisation degree, self-esteem, and knowledge of asthma, respectively. Furthermore, all values of point measure correlation (PTMEA Corr) analysis were within the acceptable specified range of the Rasch model. Infit/outfit mean square values and Z standard (ZSTD) values of each item verified the construct validity and suggested retaining all the items in the questionnaire. The reliability analyses and output tables of item measures for construct validation proved the translated Malaysian version of “Stigmatisation Degree, Self-Esteem and Knowledge Questionnaire” as a valid and highly reliable questionnaire.

KEYWORDS:

• Control
• management
• quality of life

Acknowledgments

We would like to express our gratitude to the staff of Clinical Research Centre (CRC), Hospital Selayang, Hospital Sungai Buloh and Respiratory Research Unit (UiTM) for their assistance during the course of this research. We would also like to thank Richard from “The English Editing” for his kindness in reviewing the article for language appropriateness and grammatical errors.

Declaration of interest

The authors report no conflict of interest.

Funding

This research was partially supported by Research Management Institute (RMI), Universiti Teknologi MARA (UiTM), Shah Alam, Malaysia.