RESUMO
OBJECTIVES: Evaluate the acceptability, ceiling and floor effects, reliability, and known-group validity of the Brazilian version of the Treatment Satisfaction Questionnaire for Medication (TSQM) version 1.4 in patients with hypertension. METHODS: The sample consisted of 300 hypertensive patients undergoing treatment in an outpatient department. The acceptability was evaluated from the items not answered in the TSQM. The reliability of the TSQM was estimated through Cronbach's alpha. Known-group validity tested whether the TSQM discriminates satisfaction between different stages of hypertension, diagnoses of left ventricular hypertrophy, medication adherence, and occurrence of side effects. RESULTS: The TSQM had high acceptability (99% of participants answered all items). A substantial ceiling effect was found in the side effect (89%) and global satisfaction (29%) subscales. Reliability evaluated with Cronbach's alpha showed values >0.76 in all subscales. Known-group validity was supported with a statistically significant difference in patient satisfaction effectiveness between the hypertension groups and those without left ventricular hypertrophy. Regarding medication adherence, the TSQM was able to discriminate satisfaction in the side effect and global satisfaction subscales. A significantly higher satisfaction was found in all subscales of the TSQM in those patients without side effects. CONCLUSIONS: The TSQM is a reliable and valid questionnaire to be used in Brazilians with hypertension.
Assuntos
Hipertensão/tratamento farmacológico , Adesão à Medicação/psicologia , Satisfação do Paciente , Adulto , Idoso , Brasil , Feminino , Humanos , Hipertensão/psicologia , Masculino , Adesão à Medicação/estatística & dados numéricos , Pessoa de Meia-Idade , Psicometria/instrumentação , Psicometria/métodos , Qualidade da Assistência à Saúde/normas , Qualidade da Assistência à Saúde/estatística & dados numéricos , Reprodutibilidade dos Testes , Inquéritos e QuestionáriosRESUMO
OBJECTIVE: to psychometrically test the Brazilian version of the Treatment Satisfaction Questionnaire for Medication - TSQM (version 1.4), regarding ceiling and floor effect, practicability, acceptability, reliability and validity. METHODS: participants with coronary heart disease (n=190) were recruited from an outpatient cardiology clinic at a university hospital in Southeastern Brazil and interviewed to evaluate their satisfaction with medication using the TSQM (version 1.4) and adherence using the Morisky Self-Reported Measure of Medication Adherence Scale and proportion of adherence. The Ceiling and Floor effect were analyzed considering the 15% worst and best possible TSQM scores; Practicability was assessed by time spent during TSQM interviews; Acceptability by proportion of unanswered items and participants who answered all items; Reliability through the Cronbach's alpha coefficient and Validity through the convergent construct validity between the TSQM and the adherence measures. RESULTS: TSQM was easily applied. Ceiling effect was found in the side effects domain and floor effect in the side effects and global satisfaction domains. Evidence of reliability was close to satisfied in all domains. The convergent construct validity was partially supported. CONCLUSIONS: the Brazilian TSQM presents evidence of acceptability and practicability, although its validity was weakly supported and adequate internal consistency was observed for one domain.
Assuntos
Doença das Coronárias/tratamento farmacológico , Medidas de Resultados Relatados pelo Paciente , Satisfação do Paciente , Autorrelato , Adulto , Idoso , Idoso de 80 Anos ou mais , Brasil , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Psicometria , Reprodutibilidade dos TestesRESUMO
Abstract Objective: to psychometrically test the Brazilian version of the Treatment Satisfaction Questionnaire for Medication - TSQM (version 1.4), regarding ceiling and floor effect, practicability, acceptability, reliability and validity. Methods: participants with coronary heart disease (n=190) were recruited from an outpatient cardiology clinic at a university hospital in Southeastern Brazil and interviewed to evaluate their satisfaction with medication using the TSQM (version 1.4) and adherence using the Morisky Self-Reported Measure of Medication Adherence Scale and proportion of adherence. The Ceiling and Floor effect were analyzed considering the 15% worst and best possible TSQM scores; Practicability was assessed by time spent during TSQM interviews; Acceptability by proportion of unanswered items and participants who answered all items; Reliability through the Cronbach's alpha coefficient and Validity through the convergent construct validity between the TSQM and the adherence measures. Results: TSQM was easily applied. Ceiling effect was found in the side effects domain and floor effect in the side effects and global satisfaction domains. Evidence of reliability was close to satisfied in all domains. The convergent construct validity was partially supported. Conclusions: the Brazilian TSQM presents evidence of acceptability and practicability, although its validity was weakly supported and adequate internal consistency was observed for one domain.
Resumo Objetivos: realizar o teste psicométrico da versão brasileira do Treatment Satisfaction Questionnaire for Medication - TSQM (versão 1.4) [Questionário Satisfação com Tratamento Medicamentoso] com relação aos efeitos de teto e chão, praticidade, aceitabilidade, confiabilidade e validade. Métodos: os participantes com doença cardíaca coronária (n=190) foram recrutados num ambulatório de cardiologia de um hospital universitário no sudeste do Brasil e entrevistados para avaliar satisfação em relação ao tratamento medicamentoso através da TSQM (versão 1.4) e adesão através da Morisky Self-Reported Measure of Medication Adherence Scale [Medida de Auto-Relato de Adesão ao Tratamento Medicamentoso] e proporção de aderência. Os efeitos Teto e Chão foram analisados considerando os 15% piores e 15% melhores escores possíveis obtidos no TSQM; Praticidade foi avaliada pelo tempo gasto na aplicação do TSQM durante a entrevista; Aceitabilidade foi verificada pela proporção de itens não respondidos e participantes que responderam todos os itens; Confiabilidade foi verificada com o coeficiente alfa de Cronbach e Validade através da validade de construto convergente entre o TSQM e as medidas de adesão. Resultados: o TSQM foi facilmente aplicado. O efeito teto foi encontrado no domínio efeitos colaterais e o efeito chão foi encontrado nos domínios efeitos colaterais e satisfação global. Evidência de confiabilidade foi próxima de satisfatória em todos os domínios. A validade de construto convergente foi parcialmente apoiada. Conclusões: a versão brasileira do TSQM apresenta evidência de aceitabilidade e praticidade embora sua validade tenha sido pouco apoiada e consistência interna adequada foi observada em um domínio.
Resumen Objetivos: testar las propiedades psicométricas de la versión brasileña del Treatment Satisfaction Questionnaire for Medication - TSQM (versión 1.4), considerando los efectos techo y suelo, factibilidad, aceptabilidad, confiabilidad y validez. Métodos: participantes con enfermedad coronaria (n=190) fueron reclutados de una clínica ambulatoria de cardiología en un hospital universitario en el sudeste de Brasil y entrevistados para evaluar su satisfacción con la medicación con el TSQM (versión 1.4) y su adhesión con la Morisky Self-Reported Measure of Medication Adherence Scale y proporción de adhesión. Los efectos techo y suelo fueron analizados considerando los 15% peores y mejores puntuaciones en el TSQM; la factibilidad fue evaluada por el tiempo gasto durante las entrevistas de TSQM; la aceptabilidad por la proporción de ítems no respondidos y participantes que contestaron a todos los ítems; la confiabilidad con el coeficiente alfa de Cronbach y la validez de constructo convergente entre el TSQM y las medidas de adhesión. Resultados: el TSQM fue aplicado con facilidad. El efecto de techo fue encontrado en el dominio de los efectos secundarios y el efecto suelo en los dominios de efectos secundarios y satisfacción global. Las evidencias de confiabilidad fueron aproximadamente satisfechas en todos los dominios. La validez de constructo convergente fue parcialmente apoyada. Conclusiones: la versión brasileña del TSQM presenta evidencias de aceptabilidad y factibilidad, a pesar del soporte débil a su validez y de la observación de consistencia interna adecuada para un dominio.