饮用水硬度和冠心病的关系一直为人们关注,多数研究认为呈负相关,但也有相反结论。日本近畿大学最近对大坂府44个城市的居民冠心病死亡率和饮用水硬度进行了研究。该研究根据1995年每个城市年中期的人口数和冠心病死亡人数计算该城市的冠心病死亡率,根据1997年每个城市每个水源 The relationship between drinking water hardness and coronary heart disease has always been of concern, and most studies consider it negatively correlated, but there are also contradictory conclusions. Kinki University in Japan recently studied mortality and drinking water hardness of residents in 44 cities in Osaka Prefecture. The study based on the 1995 mid-year population of each city and the number of coronary heart disease deaths calculated coronary heart disease mortality in the city, according to each city in 1997 each source of water