drinking water and the reduction in the risk of blood pressure (P value<0.05). Also, the results showed that the degree of correlation (R) between the two variables for drinking water hardness levels and the percentage of high blood pressure in men was (-0.496) and in women was (-0.512) and in the total population over 30 years was (-0.61).
Conclusion: Use of water with medium to high degree of hardness can reduce the risk of high blood pressure and consequently the risk of cardiovascular disease.
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