Validação do questionário "Conocimiento del Paciente sobre sus Medicamentos" (CPM-ES-ES) / Validation of the "Conocimiento del Paciente sobre sus Medicamentos" (CPM-ES-ES) questionnaire

Resumo Este trabalho adaptou transculturalmente o questionário espanhol "Conocimiento del Paciente sobre sus Medicamentos" (CPM-ES-ES) para uso no Brasil. Ele mede o grau de conhecimento sobre medicamentos por meio de 11 perguntas. Oitenta pacientes ≥ 80 anos foram investigados e com 39 também foi entrevistado o cuidador. A avaliação das equivalências conceitual e de item considerou o conceito de conhecimento e as perguntas que o medem como pertinentes. A equivalência semântica foi obtida pela correspondência de significado denotativo e conotativo dos itens. O estudo da equivalência de mensuração incluiu análise fatorial e o cálculo de estimativas de validade e confiabilidade. Semelhante ao questionário original, a análise de componentes principais identificou 4 componentes, porém, em 2 deles houve diferenças nos itens incluídos. Uma pergunta foi removida desta análise devido à sua inadequação amostral. O conhecimento sobre medicamentos esteve correlacionado à complexidade da prescrição r = -0,22, p = 0,046. O conhecimento sobre anti-hipertensivos esteve correlacionado à sua adesão r = 0,70, p < 0,001, e ao controle da pressão arterial rb = 0,46, p = 0,029. A versão adaptada apresentou equivalência funcional de modo que pode ser usada no contexto brasileiro.

Abstract This work cross-culturally adapted the Spanish questionnaire `Patients' knowledge about their medications ("Conocimiento del Paciente sobre sus Medicamentos" - CPM-ES-ES) for use in Brazil. It measures the level of medication knowledge by means of 11 questions. Eighty patients ≥ 80 years were investigated and in 39 cases the caregivers were interviewed. The evaluation of conceptual and item equivalences considered the concept of knowledge and the questions that assess it as pertinent. Semantic equivalence was obtained by the correspondence in the denotative and connotative meaning of items. The study of measurement equivalence included factorial analysis and the calculation of validity and reliability estimates. As with the original questionnaire, principal component analysis identified 4 components, however, in 2 of them there were differences regarding included items. One question was removed from this analysis due to its sample inadequacy. Medication knowledge was correlated with medication regimen complexity r = -.22, p = .046. Medication knowledge of antihypertensives was correlated with their adherence r = .70, p < .001, and blood pressure control rb = .46, p = .029. The adapted version revealed functional equivalence, therefore it can be used in the Brazilian context.

Measurement of patients' knowledge of their medication in community pharmacies in Portugal / Medida del conocimiento del paciente sobre su medicamento en farmacia comunitaria en Portugal

The scope of this article is to determine patients' knowledge about the medication they take. For this purpose, a cross-sectional, observational and descriptive study was conducted. Knowledge was measured by a valid and reliable questionnaire (CPM-PT-PT), given to the patients attending community pharmacies participating in the study, who had prescriptions for one or more drugs in the Lisbon Metropolitan Area. Knowledge was assessed in four dimensions: therapeutic objective, process of use, safety and maintenance of the medications that the patient takes. Thirty-five pharmacies participated, and 633 valid patients were obtained. Fully 82.5% (95% CI: 79.3% -85.3%) were uninformed about the nature of the drug they use. In all items, there was a high percentage of patients with incorrect knowledge, with emphasis on precautions (44.7%). The dimension that the patients were least aware of was "drug safety" (1.9%). Eight out of 10 patients in the population do not know what drug they use. The highest lack of correct information was with respect to the "safety" of the medication.

El objetivo do artículo es determinar el conocimiento de los pacientes sobre sus medicamentos. Estudio observacional descriptivo transversal. El conocimiento se midió mediante un cuestionario válido y fiable (CPM-PT-PT), a los pacientes que acudieron a las farmacias comunitarias participantes en el estudio solicitando uno o varios medicamentos en el Área Metropolitana de Lisboa. Se determinó el conocimiento en sus cuatro dimensiones: objetivo terapéutico, proceso de uso, seguridad y conservación de los medicamentos que el paciente utiliza. Participaron 35 farmacias, obteniéndose 633 pacientes válidos. El 82.5% (IC95%: 79,3%-85,3%) no conocen el medicamento que utilizan. En todos los ítems, hubo un alto porcentaje de pacientes con conocimiento incorrecto, destacando especialmente las precauciones (44,7%). La dimensión que menos conocen los pacientes fue la "seguridad del medicamento" (1,9%). 8 de cada 10 pacientes de la población no conocen el medicamento que utilizan. La mayor carencia de información correcta corresponde a la "seguridad" del medicamento.

Validación del cuestionario de medida del conocimiento del paciente sobre su medicamento adaptado al portugués / Validation of the Portuguese version of an instrument to measure the degree of patient knowledge about their medication

Validación de un cuestionario adaptado transculturalmente al portugués en cinco farmacias comunitarias de Portugal. Se determino la capacidad discriminante de los ítems, la validez de contenido y de constructo, análisis factorial de componentes principales, la fiabilidad y su estabilidad. Se observó un elevado grado de equivalencia semántica entre el cuestionario original y el cuestionario adaptado transculturalmente al portugués. Se obtuvo un índice de Kaiser-Meyer-Olkin de 0.550, y el test de esferidad de Bartlett confirmó la adecuación de los datos para la aplicación del análisis factorial (p < 0.0001). Se consideraron 3 factores que explicaron el 52.6% de la variabilidad total. Con respecto a la fiabilidad se obtuvo un á de Cronbach de 0.519, un C.Kappa = 0.89 y CCI = 0.756 (IC = 0.598-0.963). En este trabajo se elabora la primera adaptación para la cultura portuguesa de un cuestionario específico para medir el grado de conocimiento que tienen los pacientes sobre los medicamentos.

The scope of this study was the validation of a cross-culturally adapted questionnaire into Portuguese in five community pharmacies in Portugal. The discriminatory power of items, content and construct validity and factor analysis of the main components and their reliability and stability were determined. A high degree of semantic equivalence between the original questionnaire and the cross-culturally adapted questionnaire into Portuguese was observed. A Kaiser-Meyer-Olkin index of 0.550 was obtained and the Bartlett sphericity test confirmed the adequacy of the data for the application of factor analysis (p <0.0001). Three factors which accounted for 52.6% of the total variability were considered. With respect to reliability the following results were obtained: 0.519 for Cronbach's alpha test; 0.89 for Cohen's kappa coefficient; and 0.756 (IC=0.598-0.963) for the CCI exam. In this work, the first adaptation for the Portuguese culture of a specific questionnaire was produced to measure the degree of knowledge patients have about their medication.

Adaptação intercultural para português europeu do questionário "Conocimiento del Paciente sobre sus Medicamentos" (CPM-ES-ES) / Cross-cultural adaptation to the European Portuguese of the questionnaire "Patient Knowledge about their Medications" (CPM-ES-ES)

O objetivo deste trabalho é realizar a adaptação intercultural do espanhol para português europeu do questionário para medir o grau do "Conocimiento del Paciente sobre sus Medicamentos" (CPM-ES-ES). Aplicou-se um método baseado em seis etapas: 1. Tradução para português; 2. Preparação da primeira versão de consenso em português; 3. Retroversão para espanhol; 4. Preparação da segunda versão (equivalência cultural) de consenso; 5. Realização do pré-teste; 6. Avaliação dos resultados globais. Propõe-se um questionário adaptado culturalmente em português europeu que mede o grau do "conhecimento do doente sobre os seus medicamentos". O pré-teste de confirmação obteve 100% de concordância com a segunda versão de Consenso corrigida após o pré-teste. A metodologia selecionada permitiu adaptar culturalmente a versão em espanhol do questionário CPM-ES-ES para uma versão em português. Estudos adicionais devem demonstrar a equivalência das propriedades psicométricas da tradução intercultural em português do questionário com a versão original.

The scope of this work is to conduct the cross-cultural adaptation from Spanish to European Portuguese of a questionnaire to measure the degree of "Patient Knowledge about their Medications" (CPM-ES-ES). A method based on six steps was applied: 1. Translation into Portuguese, 2. Elaboration of the first consensus version in Portuguese; 3.Back-translation into Spanish; 4. Elaboration of the second consensus version (cultural equivalency); 5. Conducting the pre-test; 6. Evaluation of the overall results. A cross-culturally adapted questionnaire in European Portuguese that measures the degree of "Patient Knowledge about their Medications" is proposed. The pre-test confirmation obtained 100% agreement with the corrected version of the second consensus version after pre-testing. The methodology selected made it possible to cross-culturally adapt the Spanish version of the CPM-ES-ES questionnaire to the Portuguese version. Further studies should demonstrate the equivalence of the psychometric properties of the cross-cultural translation into Portuguese with the original version.