Adherence evaluation of endocrine treatment in breast cancer: methodological aspects.
BMC Cancer
; 12: 474, 2012 Oct 15.
Article
in En
| MEDLINE
| ID: mdl-23066928
ABSTRACT
BACKGROUND:
Current studies on adherence to endocrine therapy in breast cancer patients suffer from methodological limitations due to a lack of well-validated methods for assessing adherence. There is no gold standard for measuring adherence. The aim of our study was to compare four different approaches for evaluating adherence to anastrozole therapy for breast cancer with regard to concordance between methods.METHODS:
Outpatients with early breast cancer treated with anastrozole completed the multi-method assessment of adherence. We implemented a self-report scale (the Simplified Medication Adherence Questionnaire), physician- ratings, refill records and determination of anastrozole serum concentration.RESULTS:
Comparison of the four approaches using Spearman rank correlation revealed poor concordance across all methods reflecting weak correlations of 0.2-0.4. Considering this data incomparability across methods, we still observed high adherence rates of 78%-98% across measures.CONCLUSION:
Our findings contribute to the growing body of knowledge on the impact that methodological aspects exert on the results of adherence measurement in breast cancer patients receiving endocrine treatment. Our findings suggest that the development and validation of instruments specific to patients receiving endocrine agents is imperative in order to arrive at a more accurate assessment and to subsequently obtain more precise estimates of adherence rates in this patient population.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Triazoles
/
Breast Neoplasms
/
Surveys and Questionnaires
/
Medication Adherence
/
Nitriles
Type of study:
Evaluation_studies
Limits:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Middle aged
Language:
En
Journal:
BMC Cancer
Journal subject:
NEOPLASIAS
Year:
2012
Document type:
Article
Affiliation country:
Austria