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Table 3: 
Univariate analysis of treatment outcomes
Total n = 2535Neurosurgical n = 1881Endovascular n = 654P*
Overall
    Adverse outcomes (n)11.5% (292)13.2% (249)6.6% (43)<.0001
    In-hospital death (n)2.1% (53)2.5% (47)0.9% (6)<.05
    Length of stay†‡ (SD)6.8 (6.2) days7.4 (5.7) days4.5 (4.7) days<.0001
    Hospital charges† (SD)$46,250 (36,470)$47,567 (35,426)$42,044 (37,286)<.0001
Emergency department admissions onlyn = 274n = 234n = 40
    Adverse outcomes (n)16.8% (46)18.4% (43)7.5% (3).11§
    In-hospital death (n)5.5% (15)6.4% (15)0.0% (0).14§
    Length of stay†‡ (SD)10.4 (7.3) days10.4 (6.5) days10.6 (11.3) days.07
    Hospital charges† (SD)$60,161 (43,117)$60,544 (41,687)$57,840 (51,085).24
Non-emergency department admissionsn = 2261n = 1647n = 614
    Adverse outcome (n)10.9% (246)12.5% (206)6.5% (40)<.0001
    In-hospital death (n)1.7% (38)1.9 % (32)1.0% (6)0.11
    Length of stay†‡ (SD)6.3 (5.7) days7.0 (5.3) days4.2 (4.2) days<.0001
    Hospital charges† (SD)$44,408 (34,842)$45,554 (33,725)$41,020 (36,128)<.0001
  • * Pearson χ 2 test and Student t test used to evaluate statistical significance for categoric and continuous variable, respectively, comparing neurosurgical and endovascular groups, unless otherwise specified. Significant P values are grouped into 4 categories: <.05, <.01, <.001, <.0001.
  • † Natural log transformed variables then converted to original units. Values are mean (SD).
  • ‡ n = 2530 due to nonreported length of stay, n = 2256 excluding emergency department cases, n = 274 ED cases.
  • § Two-tailed Fisher Exact test used to compared neurosurgical and endovascular groups
  •  n = 2109 due to nonreported charges, n = 1866 excluding emergency department cases, n = 243 ED cases.