Psychometric assessment of the Adherence to Asthma Medication Questionnaire in asthma patients in China: a validation study

Abstract

Background

Patients’ medication adherence plays a critical role in the treatment and rehabilitation of disease. However, few tools are currently available that can be used to identify the reasons for their nonadherence with their medication regimens. It is possible to evaluate both the level of medication adherence of a patient as well as the reasons for it using the Adherence to Asthma Medication Questionnaire (AAMQ). The purpose of this study was to adapt the AAMQ for use in Chinese patients and a variety of asthma patients.

Methods

A total of 242 asthma patients were recruited from Jinzhou in China. The Adherence to Asthma Medication Questionnaire was translated and back-translated using the Brislin translation model. Test-retest reliability, internal consistency, and stability all play a large role in determining the reliability of a scale. Confirmatory factor analysis was used to examine the scale’s construct validity, and expert consultation was used to verify the scale’s content validity. Statistics were deemed significant at p < 0.05.

Results

The Cronbach’s α value of the Chinese version of the AAMQ was 0.866, and the coefficient values for the three domains ranged between 0.702 and 0.798. The split-half reliability and stability values were 0.794 and 0.772, respectively. The content validity index of the scale (S-CVI) was 0.923, and the content validity index of the level of scale entry was 0.857–1.000. According to the confirmatory factor analysis, the chi-square degreed of freedom were 1.484, and the model fitting indices were all within normal limits.

Conclusions

The AAMQ had good reliability and validity for asthmatic patients. The results of the scale’s assessment can be used as a criterion for medication adherence among asthmatic patients and to understand the causes. This study provides a reference for solving the problem of medication adherence among asthma patients and implementing targeted nursing measures.

Patient or public contribution

Gratitude is extended to all individuals collaborating in completing the survey and to the author.

Keywords:

• Medication adherence
• asthma
• factor analysis

Acknowledgements

The authors are grateful to the asthma patients who participated in this study and to the director of nursing and head nurse for their strong support in sample collection. We also thank the reviewers for their valuable comments on our manuscript. These comments were very helpful in revising and improving our article.

Disclosure statement

The authors report no conflicts of interest. The authors alone are responsible for the content and writing of this article.

Additional information

Funding

The author(s) reported there is no funding associated with the work featured in this article.