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The QALY model wich came in from a general population survey: roughly multiplicative, broadly nonlinear and sometimes contex-dependt

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Abstract

Este trabajo aplica un método, propuesto inicialmente por Miyamoto (2000), para ajustar los pesos de calidad de vida (o utilidades de los estados de salud) en función de la curvatura de la función de utilidad del tiempo de vida. El procedimiento de ajuste aplicado es robusto ante fenómenos como la propagación del error y el sesgo ocasionado por la transformación de la probabilidad. Los parámetros de curvatura estimados fueron, por lo general, consistentes con la evidencia empírica precedente. Asimismo, el presente estudio también recoge varios contrastes de axiomas clave para el modelo AVAC (Año de Vida Ajustado por la Calidad), válidos tanto para el paradigma de la utilidad esperada como para el paradigma de la utilidad dependiente del orden. Los resultados alcanzados, merced a una encuesta realizada a una gran muestra de población general, sugieren que las preferencias “medianas” de dicha muestra pueden aproximarse razonablemente bien mediante un modelo AVAC multiplicativo, dotado de una función de utilidad potencial del tiempo de vida. Por último, para un número relativamente considerable de estados de salud, hallamos evidencia contraria a la práctica habitual de transferir las utilidades de los estados de salud del contexto de decisión en el que fueron estimadas (p.ej. un contexto de certidumbre) a otro contexto diferente (p.ej. un contexto de incertidumbre).

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  • Jose Mª Abellán Perpiñán & Fernando Ignacio Sánchez Martínez & Jorge Eduardo Martínez Pérez & Ildefonso Méndez Martínez, 2009. "The QALY model wich came in from a general population survey: roughly multiplicative, broadly nonlinear and sometimes contex-dependt," Economic Working Papers at Centro de Estudios Andaluces E2009/04, Centro de Estudios Andaluces.
  • Handle: RePEc:cea:doctra:e2009_04
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