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The association between patients' beliefs about medicines and adherence to drug treatment after stroke: a cross-sectional questionnaire survey
Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Medicin. Umeå universitet, Medicinska fakulteten, Institutionen för farmakologi och klinisk neurovetenskap, Klinisk farmakologi.
Umeå universitet, Samhällsvetenskapliga fakulteten, Handelshögskolan vid Umeå universitet, Statistik.
Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Medicin.
2013 (Engelska)Ingår i: BMJ Open, ISSN 2044-6055, E-ISSN 2044-6055, Vol. 3, nr 9, artikel-id e003551Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

OBJECTIVES: Adherence to preventive drug treatment is a clinical problem and we hypothesised that patients' beliefs about medicines and stroke are associated with adherence. The objective was to examine associations between beliefs of patients with stroke about stroke and drug treatment and their adherence to drug treatment.

DESIGN: Cross-sectional questionnaire survey.

SETTING: Patients with stroke from 25 Swedish hospitals were included.

MEASUREMENTS: Questionnaires were sent to 989 patients to assess their perceptions about stroke (Brief Illness Perception Questionnaire, Brief IPQ), beliefs about medicines (Beliefs about Medicines Questionnaires, BMQ) and adherence to treatment (Medication Adherence Report Scale, MARS) 3 months after stroke onset. Only patients living at home were included in the analysis. The primary outcome was self-reported adherence as measured on MARS. MARS scores were dichotomised into adherent/non-adherent. Background and clinical data from the Swedish Stroke register were included.

RESULTS: 811 patients were still living at home and 595 answered the questionnaire. Complete MARS data were available for 578 patients and 72 (12.5%) of these were classified as non-adherent. Non-adherent patients scored lower on positive beliefs as measured on BMQ-necessity (OR = 0.90, 95% CI 0.83 to 0.98) and BMQ-benefit (OR=0.77, 95% CI 0.68 to 0.87), and higher on negative beliefs as measured on BMQ-concern (OR=1.12, 95% CI 1.05 to 1.21), BMQ-overuse (OR=1.29, 95% CI 1.14 to 1.45), and BMQ-harm (OR=1.12, 95% CI 1.01 to 1.24). The Brief IPQ showed that non-adherent patients believed their current treatment to be less useful (p=0.001).

CONCLUSIONS: This study showed associations between beliefs of Swedish patients with stroke about medicines and adherence. Positive beliefs were less common and negative more common among non-adherent. To improve adherence, patients' beliefs about medicines should be considered.

Ort, förlag, år, upplaga, sidor
2013. Vol. 3, nr 9, artikel-id e003551
Nationell ämneskategori
Samhällsfarmaci och klinisk farmaci
Identifikatorer
URN: urn:nbn:se:umu:diva-82446DOI: 10.1136/bmjopen-2013-003551ISI: 000330541900069PubMedID: 24068768OAI: oai:DiVA.org:umu-82446DiVA, id: diva2:661214
Tillgänglig från: 2013-11-01 Skapad: 2013-11-01 Senast uppdaterad: 2018-06-08Bibliografiskt granskad
Ingår i avhandling
1. Use of secondary preventive drugs after stroke
Öppna denna publikation i ny flik eller fönster >>Use of secondary preventive drugs after stroke
2013 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Background Stroke is a serious condition that can have significant impact on an individual’s health and is a significant burden on public health and public finances. Secondary preventive drug treatment after stroke is important for decreasing the risk of recurrent strokes. Non-adherence to drug treatment hampers the treatment effect, especially in long-term preventive treatments. The aim of this thesis was to study the use of secondary preventive drugs after stroke among Swedish stroke patients in terms of inequalities in implementation in clinical practice and patient adherence to treatment over time.

Methods Riks-Stroke, the Swedish stroke register, was used to sample stroke patients and as a source of information on background characteristics and medical and health care-related information including information on prescribed preventive drugs. The patients that were included had a stroke between 2004 and 2012. Individual patient data on prescriptions filled in Swedish pharmacies were retrieved from the Swedish Prescribed Drug Register and used to estimate patient adherence to drug treatment. Data on education, income, and country of birth were included from the LISA database at Statistics Sweden. A questionnaire survey was used to collect information about patients’ perceptions about stroke, beliefs about medicines, and self-reported adherence.

Results Results showed that a larger proportion of men than women were prescribed statins and warfarin after stroke. There was also a social stratification in the prescribing of statins. Patients with higher income and a higher level of education were more likely to be prescribed a statin compared to patients with low income and low level of education. Statins were also more often prescribed to patients born in Nordic countries, Europe, or outside of Europe compared to patients born in Sweden. Primary non-adherence (not continuing treatment at all within 4 months of discharge from hospital) was low for preventive drug treatment after stroke. Data on filled prescriptions, however, indicated that the proportion of patients who continued to use the drugs declined during the first 2 years after stroke. For most drugs, refill adherence in drug treatment was associated with female sex, good self-rated health, and living in institutions and (for antihypertensive drugs and statins) having used the drug before the stroke. For statins and warfarin, a first-ever stroke was also associated with continuous drug use. Self-reported adherence 3 months after stroke also showed associations with patients’ personal beliefs about medicines; non-adherent patients scored higher on negative beliefs and lower on positive beliefs about medicines.

Conclusion Inequalities between men and women and between different socioeconomic groups were found in the prescribing of secondary preventive drugs after stroke. Only a small proportion of Swedish stroke patients did not continue treatment after discharge from hospital, but the proportion of non-adherent patients increased over time. Poor adherence to preventive drug treatment after stroke is a public health problem, and improving adherence to drug treatment requires consideration of patients’ personal beliefs and perceptions about drugs.

Ort, förlag, år, upplaga, sidor
Umeå: Umeå universitet, 2013. s. 66
Serie
Umeå University medical dissertations, ISSN 0346-6612 ; 1603
Nyckelord
stroke, secondary prevention, drug use, equality, medication adherence, medication beliefs
Nationell ämneskategori
Annan klinisk medicin Samhällsfarmaci och klinisk farmaci
Forskningsämne
medicin; klinisk farmakologi; samhällsfarmaci
Identifikatorer
urn:nbn:se:umu:diva-82472 (URN)978-91-7459-736-3 (ISBN)
Disputation
2013-11-29, Sal E04, byggnad 6E, Norrlands universitetssjukhus, Umeå, 13:00 (Svenska)
Opponent
Handledare
Tillgänglig från: 2013-11-08 Skapad: 2013-11-01 Senast uppdaterad: 2018-06-08Bibliografiskt granskad

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