RT Journal Article T1 Spatial analysis of the relationship between mortality from cardiovascular and cerebrovascular disease and drinking water hardness. A1 Ferrandiz, Juan A1 Abellan, Juan J A1 Gomez-Rubio, Virgilio A1 Lopez-Quilez, Antonio A1 Sanmartin, Pilar A1 Abellan, Carlos A1 Martinez-Beneito, Miguel A A1 Melchor, Inmaculada A1 Vanaclocha, Hermelinda A1 Zurriaga, Oscar A1 Ballester, Ferran A1 Gil, Jose M A1 Perez-Hoyos, Santiago A1 Ocana, Ricardo K1 Adulto K1 Anciano K1 Calcio K1 Enfermedades Cardiovasculares K1 Trastornos Cerebrovasculares K1 Niño K1 Preescolar K1 Análisis por Conglomerados K1 Exposición a Riesgos Ambientales K1 Estudios Epidemiológicos K1 Sistemas de Información Geográfica K1 Humanos K1 Lactante K1 Magnesio K1 Masculino K1 Mediana Edad K1 Valores de Referencia K1 Medición de Riesgo K1 Agua K1 Abastecimiento de agua AB Previously published scientific papers have reported a negative correlation between drinking water hardness and cardiovascular mortality. Some ecologic and case-control studies suggest the protective effect of calcium and magnesium concentration in drinking water. In this article we present an analysis of this protective relationship in 538 municipalities of Comunidad Valenciana (Spain) from 1991-1998. We used the Spanish version of the Rapid Inquiry Facility (RIF) developed under the European Environment and Health Information System (EUROHEIS) research project. The strategy of analysis used in our study conforms to the exploratory nature of the RIF that is used as a tool to obtain quick and flexible insight into epidemiologic surveillance problems. This article describes the use of the RIF to explore possible associations between disease indicators and environmental factors. We used exposure analysis to assess the effect of both protective factors--calcium and magnesium--on mortality from cerebrovascular (ICD-9 430-438) and ischemic heart (ICD-9 410-414) diseases. This study provides statistical evidence of the relationship between mortality from cardiovascular diseases and hardness of drinking water. This relationship is stronger in cerebrovascular disease than in ischemic heart disease, is more pronounced for women than for men, and is more apparent with magnesium than with calcium concentration levels. Nevertheless, the protective nature of these two factors is not clearly established. Our results suggest the possibility of protectiveness but cannot be claimed as conclusive. The weak effects of these covariates make it difficult to separate them from the influence of socioeconomic and environmental factors. We have also performed disease mapping of standardized mortality ratios to detect clusters of municipalities with high risk. Further standardization by levels of calcium and magnesium in drinking water shows changes in the maps when we remove the effect of these covariates. PB National Institute of Environmental Health Science SN 0091-6765 YR 2004 FD 2004-04-15 LK http://hdl.handle.net/10668/1954 UL http://hdl.handle.net/10668/1954 LA en NO Ferrandiz J, Abellan JJ, Gomez-Rubio V, Lopez-Quilez A, Sanmartin P, Abellan C, et al. Spatial analysis of the relationship between mortality from cardiovascular and cerebrovascular disease and drinking water hardness Environ Health Perspect. 2004; 112(9): 1037-44 NO Journal Article; Research Support, Non-U.S. Gov't; Reproduced with permission from Environmental Health Perspectives. DS RISalud RD Apr 12, 2025