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2021 (English)In: Atherosclerosis, ISSN 0021-9150, E-ISSN 1879-1484, Vol. 336, p. 23-29Article in journal (Refereed) Published
Abstract [en]
BACKGROUND AND AIMS: We aimed to determine the relationship between statin adherence measured directly, and by self-report measures and serum cholesterol levels.
METHODS: Patients prescribed atorvastatin (N = 373) participated in a cross-sectional study 2-36 months after a coronary event. Self-reported adherence included statin adherence the past week, the 8-item Morisky medication adherence scale (MMAS-8), and the Gehi et al. adherence question. Atorvastatin was measured directly in spot blood plasma by a novel liquid chromatography tandem mass-spectrometry method discriminating adherence (0-1 doses omitted) and reduced adherence (≥2 doses omitted). Participants were unaware of the atorvastatin analyses at study participation.
RESULTS: Mean age was 63 (SD 9) years and 8% had reduced atorvastatin adherence according to the direct method. In patients classified with reduced adherence by the direct method, 40% reported reduced statin adherence, 32% reported reduced adherence with the MMAS-8 and 22% with the Gehi question. In those adherent by the direct method, 96% also reported high statin adherence, 95% reported high adherence on the MMAS-8 whereas 94% reported high adherence on the Gehi question. Cohen's kappa agreement score with the direct method was 0.4 for self-reported statin adherence, 0.3 for the Gehi question and 0.2 for the MMAS-8. Adherence determined by the direct method, self-reported statin adherence last week, and the Gehi question was inversely related to LDL-cholesterol levels with a p-value of <0.001, 0.001 and 0.004, respectively.
CONCLUSIONS: Plasma-statin measurements reveal reduced adherence with higher sensitivity than self-report measures, relate to cholesterol levels, and may prove to be a useful tool to improve lipid management.
Place, publisher, year, edition, pages
Elsevier, 2021
Keywords
Humans, Self Report, Cross-Sectional Studies, Middle Aged, Atorvastatin, Coronary Disease, Coronary heart disease, Hydroxymethylglutaryl-CoA Reductase Inhibitors, Adherence, Cholesterol, Liquid chromatography tandem mass spectrometry, Medication Adherence
National Category
Cardiology and Cardiovascular Disease
Research subject
Health and Caring Sciences
Identifiers
urn:nbn:se:lnu:diva-111996 (URN)10.1016/j.atherosclerosis.2021.09.020 (DOI)000704738900003 ()34610521 (PubMedID)2-s2.0-85116009326 (Scopus ID)2021 (Local ID)2021 (Archive number)2021 (OAI)
2022-05-032022-05-032025-02-10Bibliographically approved