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A Survey of Potentially Modifiable Patient-Level Factors Associated with Self-Report and Objectively Measured Adherence to Adjuvant Endocrine Therapies After Breast Cancer

Authors :
Toivonen KI
Carlson LE
Rash JA
Campbell TS
Source :
Patient Preference and Adherence, Vol Volume 15, Pp 2039-2050 (2021)
Publication Year :
2021
Publisher :
Dove Medical Press, 2021.

Abstract

Kirsti I Toivonen,1 Linda E Carlson,2,3 Joshua A Rash,4 Tavis S Campbell1 1Department of Psychology, University of Calgary, Calgary, AB, Canada; 2Department of Oncology, University of Calgary, Calgary, AB, Canada; 3Department of Psychosocial Resources, Tom Baker Cancer Centre, Calgary, AB, Canada; 4Department of Psychology, Memorial University of Newfoundland, St. John’s, NL, CanadaCorrespondence: Tavis S CampbellDepartment of Psychology, University of Calgary, 2500 University Dr NW, Calgary, T2N 1N4, AB, CanadaTel +1 403-210-8606Email t.s.campbell@ucalgary.caPurpose: Despite the efficacy of adjuvant endocrine therapy (AET) in reducing breast cancer recurrence and mortality, suboptimal AET adherence is common and hence an important clinical issue among breast cancer survivors. Delineating potentially modifiable patient-level factors associated with AET adherence may support the development of successful adherence-enhancing interventions.Patients and Methods: The present study included 133 breast cancer survivors prescribed AET recruited from a cancer pharmacy. Women completed a baseline questionnaire examining psychosocial factors and self-reported adherence and consented to their prescription records being monitored for the proceeding 12 months to ascertain proportion of days covered (PDC), an objective measure of adherence. Regression analyses were used to identify the factors most strongly associated with both self-reported and objective adherence. Exploratory moderation analyses examined whether factors were differentially associated with adherence based on AET type (aromatase inhibitors or tamoxifen).Results: Adherence was high in this sample (PDC over 12 months was 95%). Side effect severity was most strongly associated with self-reported adherence, followed by self-efficacy, and medication/healthcare system-related barriers. Medication/healthcare system-related barriers was the only factor that uniquely predicted objective adherence. Within medication/healthcare system-related barriers, fear of side effects was most strongly associated with both measures of adherence. There were no significant interactions between AET type and potentially modifiable factors in predicting self-reported or objective adherence.Conclusion: Side effects, reactions to side effects, and self-efficacy may represent modifiable targets through which AET adherence can be improved. Associations between potentially modifiable factors and adherence did not vary by AET type, despite distinct side-effect profiles.Keywords: adjuvant endocrine therapy, breast cancer, adherence, patient reported outcomes, side effects, symptom management

Details

Language :
English
ISSN :
1177889X
Volume :
ume 15
Database :
Directory of Open Access Journals
Journal :
Patient Preference and Adherence
Publication Type :
Academic Journal
Accession number :
edsdoj.841189d0fa4d4e569b79e13d3f8f60bd
Document Type :
article