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Development and psychometric evaluation of the Treatment Adherence Questionnaire for Patients with Hypertension

Chunhua Ma1, Shaoxian Chen, Liming You

  • 1School of Nursing, Sun Yat-Sen University, Guangzhou, China.

Journal of Advanced Nursing
|September 30, 2011
PubMed

Insights

A new Treatment Adherence Questionnaire for Patients with Hypertension was developed and psychometrically tested. This brief, reliable instrument effectively evaluates adherence to medication and lifestyle in hypertensive patients.

Area of Science:

  • Cardiology
  • Psychometrics
  • Health Services Research

Background:

  • Hypertension affects over 1 billion people globally, making adherence to treatment crucial for blood pressure control and reducing adverse outcomes.
  • Current adherence instruments are limited in comprehensively evaluating both medication and lifestyle adherence for hypertensive patients.
  • Developing a specific, validated tool is essential for improving patient management in clinical and research settings.

Purpose of the Study:

  • To develop and psychometrically test a new questionnaire for assessing treatment adherence in patients with hypertension.
  • To create a brief, reliable, and valid instrument for evaluating medication and lifestyle adherence.
  • To provide a tool applicable in both research and clinical practice for hypertensive patients.

Main Methods:

  • A multi-phase psychometric approach was employed, including literature review and focus groups for item generation.
  • Content validity was assessed by an expert panel, followed by field testing with 278 hypertensive patients.
  • Exploratory and confirmatory factor analyses, internal consistency, and test-retest reliability were used to validate the instrument.

Main Results:

  • The final questionnaire comprises 28 items across six dimensions, explaining 62.54% of the variance.
  • Confirmatory factor analysis confirmed a robust six-factor model fit.
  • The questionnaire demonstrated strong internal consistency (Cronbach's α = 0.86) and test-retest reliability (0.82).

Conclusions:

  • The developed Treatment Adherence Questionnaire for Patients with Hypertension is a brief and psychometrically sound instrument.
  • This validated tool can be effectively utilized in research and clinical settings to assess patient adherence.
  • The questionnaire provides a reliable measure for evaluating adherence to medication and lifestyle modifications in hypertensive individuals.
Abstract

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