Use of CT Angiography and Digital Subtraction Angiography in Patients with Ruptured Cerebral Aneurysm: Evaluation of a Large Multihospital Data Base

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Fig 1.
Trends in CT angiography and DSA use before clipping or coiling of ruptured aneurysms. Percentages of patients who underwent CT angiography only (blue line), DSA only (green line), or both CT angiography and DSA (red line) before clipping (left graph) or coiling (right graph) procedures from 2006–2011 are shown.
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Fig 2.
Trends in CT angiography and DSA use after clipping or coiling of ruptured aneurysms. Percentages of patients who underwent CT angiography only (blue line), DSA only (green line), both CT angiography and DSA (red line), or neither (purple line) after clipping (left graph) or coiling (right graph) procedures from 2006–2011 are shown.

Patient and hospital demographics

	Clipping	Coiling
Patient
Number of patients	1022	3950
Age, y, median (interquartile range)	53 (45–61)	55 (46–65)
Female sex, n (%)	667 (65%)	2800 (71%)
Hospital
Region, n (%)
Midwest	156 (15%)	447 (11%)
South	436 (43%)	1666 (42%)
Northeast	273 (27%)	1290 (33%)
West	157 (15%)	547 (14%)
Median number of beds (range)	623 (447–725)	623 (442–683)
Urban location, n (versus rural)	1011 (99%)	3857 (98%)
Teaching, n (versus nonteaching)	699 (68%)	2684 (68%)