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TABLE 1: 
Clinical characteristics of 421 patients who underwent endovascular treatment of unruptured intracranial aneurysms
Age (yr) (n = 420)
 Mean56
 Median56
 Interquartile range47–67
 Range15–88
Female sex (n = 421)326 (77%)
Race (n = 307)
 White237 (77%)
 Black24 (8%)
 Hispanic22 (7%)
 Asian/Pacific Islands10 (3%)
 Native American3 (1%)
 Other11 (4%)
Median household income for ZIP code of residence (n = 405)
 <$25,00036 (9%)
 $25,000–$34,999117 (29%)
 $35,000–$44,999122 (30%)
 >$45,000130 (32%)
Primary payer (n = 421)
 Medicare113 (27%)
 Medicaid28 (7%)
 Private insurance257 (61%)
 Self-pay6 (1%)
 No charge2 (0.5%)
 Other15 (4%)
Admission type (n = 279)
 Emergency19 (7%)
 Urgent42 (15%)
 Routine218 (78%)
Admission source (n = 417)
 Emergency ward7 (2%)
 Transfer from acute care hospital21 (5%)
 Transfer from long term care11 (3%)
 Routine378 (91%)
Year of treatment
 199630 (7%)
 199782 (19%)
 199857 (14%)
 1999125 (30%)
 2000127 (30%)