Table 3: Univariate analyses: hemorrhage versus no hemorrhage and surgery versus no surgery.

N Group numberHemorrhage ( )No hemorrhage ( )
1 versus 2
  P
1a versus 1b

2a versus 2b
AllSurgeryNo SurgeryAllSurgeryNo Surgery
6,1447455,39951,0986,69744,401
11a1b22a2b

Age50.7 (17.1)51.7 (16.6)50.6 (17.2)48.9 (17.3)41.6 (13.9)50.0 (17.5)<0.0010.094<0.001
Female (%)49.447.949.652.853.852.7<0.0010.4040.092
Race (%)<0.001<0.001<0.001
 White64.658.865.368.264.968.6
 Black13.514.713.411.68.412.1
 Hispanic13.813.913.813.117.912.4
 Asian4.16.43.83.54.43.4
 Native Americ0.200.30.60.60.6
 Other3.76.23.43.13.83
Admission (%)<0.0010.0010.001
 Emergent66.760.567.543.110.347.1
 Urgent24.428.423.815.910.916.5
 Elective8.711.18.340.878.836.2
 Emergent and Urgent91.188.999.65921.263.6
Number of diagnoses6.7 (3.5)7.5 (3.3)6.6 (3.5)5.6 (3.6)4.2 (2.9)5.8 (3.7)<0.001<0.001<0.001
Number of procedures3 (2.9)5.5 (3.1)2.6 (2.7)1.8 (1.9)3.2 (2.3)1.6 (1.7)<0.001<0.001<0.001
Diagnosis, any (%)
 ICH65.471.164.6000<0.001<0.001
 SAH31.326.232000<0.0010.002
 Other ICrH9.412.98.9000<0.0010.001
 Acute Ischemia4.542.77.41.48.3<0.0010.053<0.001
 Seizure19.41719.733.733.433.7<0.0010.0780.681
 Headache4.61.55105.710.6<0.001<0.001<0.001
 ICA aneurysm, unruptured3.12.73.12.62.42.7<0.0010.5170.252
 Angiogram50.950.750.934.745.933.2<0.0010.937<0.001
 Embolization78.26.914.311.614.7<0.0010.213<0.001
 Surgery12.112.10.099
 Radiosurgery0.100.12.20.32.5<0.0010.405<0.001
 Aneurysm clipping4.22.94.411.70.9<0.0010.065<0.001
 Ventilation, all durations23.236.121.42.74.92.5<0.001<0.001<0.001
 Ventilation >95 h1122.69.30.92.40.7<0.001<0.001<0.001
 Length of stay (d)10.4 (12.9)16.4 (11.5)9.6 (12.9)4.6 (5.8)6.8 (6.4)4.3 (5.7)<0.001<0.001<0.001
Outcome (%)<0.001<0.001<0.001
 Routine discharge44.431.546.279.379.779.3
 Short-term hospital12.43.913.63.10.63.4
 Other type facility27.645.625.110.213.79.8
 Home health care5.47.15.25.74.75.8
 Death9.211.88.90.91.10.9
 Unfavorable outcome42.264.539.216.819.516.5
 Charges mean ($)71,151 (90,787)14,0034 (123,099)61,256 (80,452)35,792 (46,033)77,846 (68,618)30,090 (38,675)<0.001<0.001
 Charges sum ($)414.8 Mill102.6 Mill312.3 Mill1,717.4 Mill539 Mill1,380 Mill
Hospital Characteristics
Bed Size0.01<0.0010.006
 Small39.440.339.340.140.440.1
 Medium26.232.425.42826.128.2
 Large34.327.435.331.933.631.7
Location/Teaching0.265<0.0010.001
 Rural43.651.842.542.443.442.2
 Urban Non-Teaching40.129.141.740.941.840.7
 Urban Teaching16.319.115.916.714.817
Hospital Region0.088<0.001<0.001
 NE18.218.518.219.414.720.1
 NW/NC2221.322.122.41623.3
 S33.927.634.833.933.134
 W25.832.724.924.336.222.7

Standard deviation in parenthesis.
Abbreviations: ICrH: intracranial hemorrhage, SAH: subarachnoid hemorrhage, ICA: internal carotid artery.