Subarachnoid Hemorrhage Incidence in the United States Does Not Vary with Season or Temperature

BACKGROUND AND PURPOSE:

Previous studies have suggested seasonal variations in rates of spontaneous rupture of intracranial aneurysms, leading to potentially devastating SAH. In an effort to identify a seasonal effect, variation in SAH incidence and in-hospital mortality rates were examined as they relate to admission month, temperature, and climate using HCUP9s Nationwide Inpatient Sample.

MATERIALS AND METHODS:

Cases of...