Development and evaluation of a medication adherence self-efficacy scale in hypertensive African-American patients

Gbenga Ogedegbe, Carol A. Mancuso, John P. Allegrante, Mary E. Charlson

Research output: Contribution to journalArticle

Abstract

Self-efficacy, a known predictor of a wide range of health behaviors, has not been investigated in studies of adherence to antihypertensive medications. A medication adherence self-efficacy scale was developed and evaluated in ambulatory hypertensive African-American patients in two sequential phases. For the item-generation phase, open-ended interviews with 106 patients were used to elicit their experiences with taking antihypertensive medications. Using qualitative techniques, responses were recorded verbatim, coded, and sorted into nine categories of barriers and facilitators of medication adherence. Concepts from categories were formatted into an initial 43-item self-efficacy questionnaire, which was administered to another group of 72 patients for the item analyses phase. Twenty-six items were retained for the final self-efficacy scale based on item-to-total correlation coefficient > 0.5, kappa > 0.4, and clinical relevance of individual items. Clinicians and researchers can use this scale to identify situations in which patients have low self-efficacy in adhering to prescribed medications.

Original languageEnglish (US)
Pages (from-to)520-529
Number of pages10
JournalJournal of Clinical Epidemiology
Volume56
Issue number6
DOIs
StatePublished - Jun 1 2003

Keywords

  • Adherence
  • African Americans
  • Health behavior
  • Hypertension
  • Scale
  • Self-efficacy

ASJC Scopus subject areas

  • Epidemiology

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