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Related Experiment Videos

Drug therapy concerns questionnaire: initial development and refinement.

Susan J Blalock1, Rajul A Patel

  • 1School of Pharmacy, CB# 7360, University of North Carolina, Chapel Hill, NC 27599-7360, USA. s_blalock@unc.edu

Journal of the American Pharmacists Association : Japha
|May 5, 2005
PubMed
Summary
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A new scale helps measure patient perceptions of drug therapy problems (DTPs). This tool shows that fewer DTPs correlate with higher patient satisfaction with medications.

Area of Science:

  • Pharmacoeconomics
  • Patient-Reported Outcomes
  • Health Services Research

Background:

  • Patient perceptions of drug therapy problems (DTPs) are crucial for medication adherence and outcomes.
  • Existing tools may not adequately capture patient perspectives on DTPs.
  • Self-administered assessments are needed to efficiently gather patient insights.

Purpose of the Study:

  • To develop and validate a self-administered scale for assessing patient perceptions of DTPs.
  • To explore the relationship between perceived DTPs and patient satisfaction with medications.

Main Methods:

  • Cross-sectional survey of 200 community-dwelling adults using prescription medications.
  • Development of a 78-item scale based on the Medication Evaluation and Response Model.

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  • Reliability testing (Cronbach's alpha) and factor analysis of scale domains.

    • Main Results:

    • Five reliable scales were developed: Perceived Efficacy, Overmedication Concerns, Adverse Drug Reaction Concerns, Adherence Issues, and Knowledge.
    • These scales demonstrated good internal consistency (Cronbach's alpha 0.76–0.82).
    • Four scales significantly predicted medication satisfaction, explaining 58% of the variance.

    Conclusions:

    • The developed scale shows promise for measuring patient perceptions of DTPs.
    • Findings suggest that addressing DTPs is linked to improved patient satisfaction with medications.
    • The scale may be valuable for understanding factors influencing medication evaluation.