Title |
Cross-cultural adaptation of the Beliefs about Medicines Questionnaire into Portuguese
|
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Published in |
Sao Paulo Medical Journal, April 2013
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DOI | 10.1590/s1516-31802013000100018 |
Pubmed ID | |
Authors |
Teresa Salgado, Alexandra Marques, Leonor Geraldes, Shalom Benrimoj, Robert Horne, Fernando Fernandez-Llimos |
Abstract |
The Beliefs about Medicines Questionnaire (BMQ-Specific) has proven useful for measuring patients' beliefs and associating them with non-adherence to treatment in several illness groups. The aim was to cross-culturally adapt the BMQ-Specific into Portuguese for the general population of medicine users. Cross-sectional study conducted among users of public hospitals and outpatient clinics in Guarda and Covilhã, Portugal. The BMQ-Specific was translated using international recommendations for performing cross-cultural adaptation and was administered to 300 patients. An initial principal component analysis (PCA) was conducted with the extraction criterion of eigenvalue > 1.0, followed by a second PCA with restriction to two components. Reliability was assessed by calculating Cronbach's alpha coefficient. The mean scores obtained for the Necessity and Concerns subscales of the Portuguese BMQ-Specific were 19.9 (standard deviation, SD = 2.8) (range 10 to 25) and 17.7 (SD = 3.9) (range 6 to 30), respectively. The first PCA produced an unstable three-component structure for the Portuguese BMQ-Specific. The final PCA solution yielded a two-component structure identical to the original English version (a five-item Necessity and a six-item Concerns subscale), and explained 44% of the variance. Cronbach's alpha for the complete Portuguese BMQ-Specific was 0.70, and 0.76 and 0.67 for the Necessity and Concerns subscales, respectively. A cross-culturally adapted Portuguese version of the BMQ-Specific questionnaire for use among the general population of medicine users was obtained, presenting good internal consistency and component structure identical to the original English version. |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Venezuela, Bolivarian Republic of | 1 | 2% |
Unknown | 47 | 98% |
Demographic breakdown
Readers by professional status | Count | As % |
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Student > Master | 17 | 35% |
Student > Bachelor | 5 | 10% |
Student > Postgraduate | 4 | 8% |
Student > Ph. D. Student | 4 | 8% |
Professor > Associate Professor | 3 | 6% |
Other | 7 | 15% |
Unknown | 8 | 17% |
Readers by discipline | Count | As % |
---|---|---|
Pharmacology, Toxicology and Pharmaceutical Science | 13 | 27% |
Medicine and Dentistry | 12 | 25% |
Psychology | 6 | 13% |
Nursing and Health Professions | 4 | 8% |
Biochemistry, Genetics and Molecular Biology | 1 | 2% |
Other | 4 | 8% |
Unknown | 8 | 17% |