RESUMO
Background: Self-reported adherence scales are widely used in research and practice because they are low in cost and easy to apply. A free version in Brazilian-Portuguese of the Simplified Medication Adherence Questionnaire (SMAQ) can be a useful alternative for determining the adherent behavior of hypertensive patients. Purpose: To translate and evaluate the psychometric properties of the Brazilian-Portuguese version of the SMAQ therapeutic adherence scale for patients with arterial hypertension. Patients and methods: A multicenter, cross-sectional study was conducted in five outpatient units in Maceió-AL and Aracaju-SE between January and July 2019. A total of 117 patients aged over 18 years using antihypertensive drugs were recruited. The cross-cultural adaptation followed international methodological recommendations. Internal consistency (Cronbach's alpha) was tested as a reliability parameter. Criterion and construct validity were verified by concurrent validation, exploratory factor analysis (EFA), and validation by known groups. Results: The participants had a mean age of 56.6 years (SD = 10.7 years); most were female (72.6%). The mean number of antihypertensives prescribed per patient was 1.87 (SD = 0.87). There were 79.5% (n = 86) of patients considered non-adherent. Internal consistency was satisfactory (Cronbach's alpha = 0.63). A satisfactory correlation coefficient was verified with the Morisky-Green-Levine test as an external criterion (r = 0.56, p < 0.001). The scale's sensitivity measured through known group validity was 75.3%, specificity 29.5%, positive predictive value 63.9%, and negative predictive value 41.9%. We identified two factors of the instrument's construct from EFA: specific medication-taking behaviors and barriers to adherence. The initial KMO measure of sampling adequacy was 0.691, and Bartlett's test of sphericity was significant (χ2 = 118.342, p < 0.001). Conclusion: The Brazilian-Portuguese version of the SMAQ scale proved valid and reliable for determining adherence to the pharmacotherapy in hypertensive patients. It showed more ability to detect non-adherent patients but with low specificity, possibly influenced by high social desirability.
RESUMO
WHAT IS KNOWN AND OBJECTIVE: Qualified dispensing is fundamental for the promotion of the rational use of medicines. Documentation is an indicator of quality and one of the essential steps in the care process. However, in Brazil, there are no models of clinical documentation applicable to dispensing practices. Thus, the objective of this study was to develop and validate an instrument to document the dispensing process of prescribed medicines. METHODS: A methodological development study was carried out from February 2017 to October 2017 in two stages, which were (i) the development of the instrument and (ii) content validation of the proposed instrument. The development phase comprised three stages, which were (i) the elaboration of the prototype based on a previously performed systematic review, (ii) academic brainstorming and (iii) a pre-Delphi consensus. The content validation process was performed using the Delphi technique. The instrument was sent to 40 experts with experience in dispensing, and the consensus among them was calculated using the content validity index (CVI). The study was approved by the Ethics Committee, and all participants signed an informed consent document detailing the terms of the study. RESULTS: In the development stage, three versions of the instrument were generated, which were the prototype, version 1 (changed after academic brainstorming) and version 2 (changed after the pre-Delphi). In the content validation process of version 2 of the instrument, 23 experts returned their evaluation in the first round of the Delphi process and 17 in the second. All the items obtained a CVI >0.83, which resulted in the validation of the instrument. The final instrument comprised the following sections: general information, the identification of technical and legal problems of prescriptions, the conduct for the resolution of the technical and legal problems of prescriptions, medication dispensed, suspected drug-related problems, verbal guidance, written guidance, referral and the referral result. WHAT IS NEW AND CONCLUSION: The developed and validated instrument presents the main variables that should be documented during the dispensing process.
