Análisis de las aguas embotelladas y de grifo espa？olas y de las implicaciones de su consumo en la litiasis urinaria

objective: to perform a chemical analysis of all the available waters in spain with the idea of offering consume recommendations to lithiasic patients. material and methods: information research of the chemical composition of spanish tap and bottled water in publications, supermarkets and internet. a descriptive study, and a correlation study between water components by means of pearson test were performed. results: information about composition from tap water of most of the main spanish cities and 85 bottled water brands was found. a significant correlation between calcium and magnesium concentration (p=0.0001) and high correlation between bicarbonate and sodium concentration (p=0.0001, pearson coefficient 0.958) was found. it is also offered water classifications according to calcium, bicarbonate, sodium and magnesium concentrations. conclusion: a guideline about water election for lithiasic patients is offered according to their geographical origin and dietetic preferences, mainly lactic consume.