The effect of conflicting medication information and physician support on medication adherence for chronically ill patients.

Abstract:

OBJECTIVE:This article explores the effect of conflicting information, defined as contradictory information about medication topics from different sources, on medication adherence in a sample of chronically ill patients. We specifically investigate whether conflicting information and physician support directly affect medication adherence or whether the effect is mediated by adherence self-efficacy and outcome expectations for medications. METHODS:Vasculitis patients (n = 228) completed two on-line questionnaires which contained measures of conflicting information, adherence self-efficacy, outcome expectations, physician support, and medication adherence. We conducted a mediation analysis using a bootstrapping approach to generate point estimates and 95% confidence intervals to test the significance of each mediated effect. RESULTS:A majority of patients (51.3%) received conflicting medication information. Conflicting information had a direct negative effect on medication adherence, which was not mediated by self-efficacy or outcome expectations. Alternatively, self-efficacy mediated the positive effect of physician support on medication adherence. CONCLUSION:Patients who encounter conflicting medication information are less adherent to their medications. The presence of a supportive physician may counteract the negative effect of conflicting medication information. PRACTICE IMPLICATIONS:Physicians should initiate conversations about conflicting medication information with their patients. Consensus-based guidelines that address medication discrepancies may also reduce the availability of conflicting information.

journal_name

Patient Educ Couns

authors

Carpenter DM,DeVellis RF,Fisher EB,DeVellis BM,Hogan SL,Jordan JM

doi

10.1016/j.pec.2009.11.006

subject

Has Abstract

pub_date

2010-11-01 00:00:00

pages

169-76

issue

2

eissn

0738-3991

issn

1873-5134

pii

S0738-3991(09)00583-7

journal_volume

81

pub_type

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