Fiabilidad y validez externa de un cuestionario de conocimiento sobre riesgo y enfermedad cardiovascular en pacientes que acuden a farmacias comunitarias de España / Reliability and external validity of a questionnaire to assess the knowledge about risk and cardiovascular disease and in patients attending Spanish community pharmacies

OBJETIVOS: Determinar la fiabilidad test-retest de un cuestionario, con validación preliminar, para valorar el conocimiento sobre riesgo cardiovascular (RCV) y enfermedad cardiovascular, en pacientes atendidos en farmacias comunitarias de España.complementar la validez externa, estableciendo la relación entre una actividad educativa y el aumento del conocimiento sobre RCV y enfermedad cardiovascular. DISEÑO: Subanálisis del estudio clínico controlado EMDADER-CV, en el que se aplicó un cuestionario de conocimiento sobre RCV en 4 momentos. Emplazamiento. Farmacia comunitaria española. PARTICIPANTES: Trescientos veintitrés pacientes del grupo control, de los 640 que finalizaron el estudio. MEDICIONES PRINCIPALES: Coeficiente de correlación intraclase para evaluar la fiabilidad en 3 comparaciones (postactividad educativa con semana 16, postactividad educativa con semana 32, y semana 16 con semana 32); y prueba no paramétrica de Friedman para establecer la relación entre una actividad educativa oral y escrita con el aumento del conocimiento. RESULTADOS: Para los 323 pacientes, en las 3 comparaciones, los valores del coeficiente de correlación intraclase fueron 0,624; 0,608 y 0,801 (fiabilidad aceptable-buena a excelente). Por su parte, la prueba de Friedman mostró relación entre la actividad educativa y el aumento del conocimiento, estadísticamente significativa (p < 0,0001). CONCLUSIONES: Acorde con el coeficiente de correlación intraclase, el cuestionario orientado a valorar el conocimiento sobre el RCV y enfermedad cardiovascular tiene una fiabilidad entre aceptable y excelente, lo cual, sumado a la validación previa, indica que dicho instrumento cumple los criterios de validez y fiabilidad. Además, el cuestionario evidencia capacidad de relacionar un aumento en el conocimiento con una intervención educativa, característica que complementa su validez extern¡a

OBJECTIVES: To determine the test-retest reliability of a questionnaire, with a validation preliminary, to assess knowledge of cardiovascular risk (CVR) and cardiovascular disease in patients attending community pharmacies in Spain. To complement the external validity, establishing the relationship between an educational activity and the increase in knowledge about CVR and cardiovascular disease. DESIGN: Sub-analysis of a controlled clinical study, EMDADER-CV, in which a questionnaire about knowledge concerning CVR was applied at 4 different times. LOCATION: Spanish Community Pharmacies. Participants. There were 323 patients in the control group, from the 640 who completed the study. Main measurements. Intraclass correlation coefficient to assess the reliability in 3 comparisons (post-educational activity with week 16, post-educational activity with week 32, and week 16 with week 32); and the non-parametric Friedman test to establish the relationship between an oral and written educational activity with increasing knowledge. RESULTS: For the 323 patients in the 3 comparisons, the intraclass correlation coefficient values were 0.624; 0.608 and 0.801, respectively (fair-good to excellent reliability). So, the Friedman test showed a statistically significant relationship between educational activity and increased knowledge (p < 0,0001). CONCLUSIONS: According to the intraclass correlation coefficient, the questionnaire aimed at assessing the knowledge on CVR and cardiovascular disease has a reliability between acceptable and excellent, which added to the previous validation, shows that the instrument meets the criteria of validity and reliability. Furthermore, the questionnaire showed the ability to relate an increase in knowledge with an educational intervention, feature that complements its external validity

[Reliability and external validity of a questionnaire to assess the knowledge about risk and cardiovascular disease and in patients attending Spanish community pharmacies]. / Fiabilidad y validez externa de un cuestionario de conocimiento sobre riesgo y enfermedad cardiovascular en pacientes que acuden a farmacias comunitarias de España.

OBJECTIVES: To determine the test-retest reliability of a questionnaire, with a validation preliminary, to assess knowledge of cardiovascular risk (CVR) and cardiovascular disease in patients attending community pharmacies in Spain. To complement the external validity, establishing the relationship between an educational activity and the increase in knowledge about CVR and cardiovascular disease. DESIGN: Sub-analysis of a controlled clinical study, EMDADER-CV, in which a questionnaire about knowledge concerning CVR was applied at 4 different times. LOCATION: Spanish Community Pharmacies. PARTICIPANTS: There were 323 patients in the control group, from the 640 who completed the study. MAIN MEASUREMENTS: Intraclass correlation coefficient to assess the reliability in 3 comparisons (post-educational activity with week 16, post-educational activity with week 32, and week 16 with week 32); and the non-parametric Friedman test to establish the relationship between an oral and written educational activity with increasing knowledge. RESULTS: For the 323 patients in the 3 comparisons, the intraclass correlation coefficient values were 0.624; 0.608 and 0.801, respectively (fair-good to excellent reliability). So, the Friedman test showed a statistically significant relationship between educational activity and increased knowledge (p < .0001). CONCLUSIONS: According to the intraclass correlation coefficient, the questionnaire aimed at assessing the knowledge on CVR and cardiovascular disease has a reliability between acceptable and excellent, which added to the previous validation, shows that the instrument meets the criteria of validity and reliability. Furthermore, the questionnaire showed the ability to relate an increase in knowledge with an educational intervention, feature that complements its external validity.