Aneurysmal Subarachnoid Hemorrhage: Trends, Outcomes, and Predictions From a 15-Year Perspective of a Single Neurocritical Care Unit.

Changes in the Utilization of Diagnostic Procedures When examining the change in utilization of diagnostic procedures, an interesting trend appears: overall more imaging studies and electroencephalograms (Figure 2 ) were performed in the last 5 yr in comparison with the first 5 yr of our study; there is a statistically significant reduction in the number of patients undergoing repeat digital subtraction angiography (DSA) after an initial study performed at admission.

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There was a ceiling effect for the high-grade patients, since there was only a nonsignificant trend in improved outcome for this group.

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