بررسي ارتباط بين سختي آبهاي آشاميدني با ميزان فشارخون افراد

Study of the Relationship between the Hardness of Drinking Water and the Blood Pressure of Rural Residents of 30 - 60 Years of age in Sabzevar

Hypertension is considered as the third risk factor in Death Triangle caused by cardiovascular diseases , in association with LDL-c and is named the dormant killer. This study involved 8122 rural residents of 36 villages in Sabzevar, whose drinking water were ranked light , relatively light, relatively hard , hard and extremely hard. Information on the total hardness , Calcium , Magnesium, Potassium , Sodium and chlorine were obtained from the municipial Sewerage office . Then , Systolic and diastolic bp of all 30 to 60 - year - old residents of the villages were measured and the correlation between water hardness and bp rate were calculated using Pearson correlation coefficient and regression . The study data revealed that the more the water hardness, the higher will be the systolic and diastolic measurements . Also , there was a significant positive cotrelation between systolic readings and water hardness and the ratio of Sodium and potassium . However , the correlation between diastolic reading and total water hardness was negatively significant ; it was positively significant for the ratio of sodium and potassium. The study revealed that the higher the water hardness (which enhances the sodium content ) , the higher the by measurements in people drinking it .