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.
Keywords
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Article info
Publication history
Accepted:
February 16,
2003
Received in revised form:
January 31,
2003
Received:
August 8,
2002
Identification
Copyright
© 2003 Elsevier Inc. Published by Elsevier Inc. All rights reserved.
