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Original Article

Development of a Specific Questionnaire Measuring Patient Satisfaction with Glaucoma Treatment: Glausat

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Pages 131-143 | Received 25 Sep 2007, Accepted 03 Feb 2010, Published online: 11 May 2010
 

Abstract

Objective: Patient satisfaction with glaucoma therapy is one of the aspects that affects adequate adherence to treatment; therefore, it would be interesting to measure the satisfaction properly. We present the development process and psychometric properties of a new instrument for measuring patient satisfaction with glaucoma treatment.

Material and methods: After collection and discussion of contents, a 38-item questionnaire was proposed and arranged into seven theoretical domains. The questionnaire was applied to a sample of 194 patients and its length was reduced using an exploratory factor analysis. Psychometric properties were assessed under classic theory.

Results: The final questionnaire is formed by 22 items grouped into seven dimensions: expectations and beliefs about treatment, ease of use, efficacy, undesired effects, impact on health-related quality of life, medical care, and general satisfaction with treatment. Some dimensions correlated slightly. The reliability of the dimensions ranged from 0.77 to 0.93. Confirmatory factor analysis revealed an additional support of the proposed structure (χ2 (188) = 217, P = 0.073). Glausat scores were proven to correlate with patients’ self rating on medication tolerability, and with clinicians’ assessment of tolerability, effectiveness and compliance.

Conclusions: The Glausat questionnaire has proven to be reliable and structurally valid. This instrument may be used to assess patients’ satisfaction with glaucoma treatment.

ACKNOWLEDGMENTS

Declaration of Interest: The present study was carried out with an unrestricted grant from Pfizer España, S.A., and with the personnel and material support from the Universidad Autónoma de Madrid (Spain). There are no professional conflicts of interest from the authors with the granting institution.

APPENDIX

CUESTIONARIO DE SATISFACCIÓN CON EL TRATAMIENTO DEL GLAUCOMA

Deseamos recoger su opinión sobre la su satisfacción con la medicación que está tomando para el glaucoma y la atención médica que recibe para la enfermedad.

En cada pregunta, tache el número que mejor refleja su opinión. No existen respuestas correctas o incorrectas. Si no está seguro de alguna de las respuestas, marque la que le parezca más adecuada.

Esta sección hace referencia a lo que opina del tratamiento que sigue y lo que espera de él

Esta sección hace referencia a la comodidad de la medicación y la facilidad para aplicarla

Esta sección se refiere a la eficacia de la medicación, es decir, a su capacidad para tratar el glaucoma

Esta sección hace referencia a los efectos no deseados producidos por la medicación. Marque la opción Nada si no tiene ese efecto indeseado.

Esta sección hace referencia al impacto de la medicación que utiliza sobre su vida cotidiana

Esta sección hace referencia al equipo médico que le atiende

Esta sección hace referencia a su satisfacción general sobre la medicación que utiliza

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