• Jesús Martín-Fernández, Francisco Javier Pérez-Rivas, Tomás Gómez-Gascón, Isabel del Cura-González, Eugenia Tello Bernabé, Gemma Rodríguez-Martínez, Elena Polentinos-Castro, Julia Domínguez-Bidagor, Gloria Ariza-Cardiel, Juan Francisco Conde-López, Milagros Beamud-Lagos, Oscar Aguado-Arroyo, Teresa Sanz-Bayona, and Ana Isabel Gil-Lacruz.
• Family Medicine Unit, West Area, Primary Care, Madrid Health Service, Spain. jmartinefe@hotmail.com
• Bmc Fam Pract. 2011 Oct 3; 12: 109.

BackgroundThe identification of the attribution of economic value that users of a health system assign to a health service could be useful in planning these services. The method of contingent valuation can provide information about the user's perception of value in monetary terms, and therefore comparable between services of a very different nature. This study attempts to extract the economic value that the subject, user of primary care nursing services in a public health system, attributes to this service by the method of contingent valuation, based on the perspectives of Willingness to Pay (WTP) and Willingness to Accept [Compensation] (WTA).Methods/DesignThis is an economic study with a transversal design. The contingent valuation method will be used to estimate the user's willingness to pay (WTP) for the care received from the primary care nurse and the willingness to accept [compensation] (WTA), were this service eliminated. A survey that meets the requisites of the contingent valuation method will be constructed and pilot-tested. Subsequently, 600 interviews will be performed with subjects chosen by systematic randomized sampling from among those who visit nursing at twenty health centers with different socioeconomic characteristics in the Community of Madrid. The characteristics of the subject and of the care received that can explain the variations in WTP, WTA and in the WTP/WTA ratio expressed will be studied. A theoretical validation of contingent valuation will be performed constructing two explanatory multivariate mixed models in which the dependent variable will be WTP, and the WTP/WTA relationship, respectively.DiscussionThe identification of the attribution of economic value to a health service that does not have a direct price at the time of use, such as a visit to primary care nursing, and the definition of a profile of "loss aversion" in reference to the service evaluated, can be relevant elements in planning, enabling incorporating patient preferences to health policy decision-making.

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