OBJECTIVES: Parkinson´s disease is a neurodegenerative disorder with an estimated incidence of 40-50 cases per 100,00 habitants per year. The EQ-5D health-related quality of life instrument comprises a health state classification followed by a health evaluation using a visual analogue scale (VAS). In this paper, we examine the correspondence between VAS scores and health state classifications for a mexican sample, and identify variables which contribute to determining the VAS scores.  METHODS: A mexican retrospective study of patients having Parkinson´s disease from the National Institute of Neurology and Neurosurgery (INNN) provided EQ-5D data. Information on seveirty, psychosis and socio-demographic characteristics had been collected using other instruments. A stepwise linear regression model was fitted, in which the choice of predictive variables is carried out by an automatic procedure. VAS score was the dependent variable, independent variables comprised EQ-5D health state classifications, severity, age, psychosis and socio-demographic characteristics.  RESULTS: (p-value<.05, R=19)