Occurrence of hyponatremia is most prevalent in the first day of the disease, accounting for 15%, the percentages ofpatients with occurrence of 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Intracerebral (n=283) Subarachnoid (n=126) 41% (11 6)) 50, 8% (6 4) 53% (15 0) 46% (58) 6% (17) 3, 2% (4) Hypernatremia Normal Hyponatremia 10 hyponatremia from day 1 to day 4, from day 5 to day 8, and between day 9 and from day 14 are 42.23%, 32.72% and 16.67%, respectively.