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. Author manuscript; available in PMC: 2015 Jun 15.
Published in final edited form as: J Stroke Cerebrovasc Dis. 2013 May 13;23(2):327–334. doi: 10.1016/j.jstrokecerebrovasdis.2013.03.036

Table 3. Patient Demographics According to Mechanical Thrombectomy Volume at Treating Centers.

Association between patient demographics and admission to substantial volume mechanical thrombectomy centers (with respect to all stroke admissions)

Group Thrombectomy at high procedural volume centers (% of all patients receiving thrombectomy) Univariate analysis. P-value, odds ratio [CI] Multivariate analysis. P-value, odds ratio [CI]
Ethnicity (analysis: versus white)
White 1299 (76.82%)
Black 133 (73.51%) 0.3192, 0.837[0.591,1.187] 0.0876, 0.717[0.489,1.050]
Hispanic 125 (70.92%) 0.0811, 0.736[0.522,1.039] 0.0335, 0.654[0.442,0.967]
Asian/Pacific Islander 34 (48.98%) <0.001, 0.290[0.179,0.469] <0.001, 0.205[0.120,0.350]
Native American 10 (100%) 0.9769, >999[<0.001,>999] 0.9781, >999[<0.001,>999]
other 54 (77.71%) 0.8642, 1.052[0.590,1.876] 0.9656, 0.987[0.535,1.820]
Population Density ((analysis: versus central counties with >1million population)
Central counties with >1 million population 687 (71.90%)
Fringe counties with >1million population 506 (75.48%) 0.109, 1.203[0.960,1.507] 0.376, 1.130[0.862,1.481]
Counties with 250K to 1 million 190 (67.96%) 0.202, 0.829[0.621,1.106] 0.025, 0.672[0.474,0.951]
Counties with 50K to 250K 184 (76.98%) 0.115, 1.307[0.937,1.822] 0.401, 1.183[0.799,1.751]
Micropolitan counties 263 (85.99%) <0.001, 2.398[1.686,3.411] 0.868, 0.963[0.618,1.501]
Non-micropolitan/metropolitan counties 155 (85.83%) 0.0001, 2.367[1.523,3.681] 0.059, 1.970[0.975,3.978]
Median wealth of zipcode (analysis: versus > $63,000)
< $39,000 675 (81.86%) 0.0001, 1.648[1.280,2.121] 0.0025, 1.656[1.195,2.297]
$39,000 to 47,999 532 (73.66%) 0.8649, 1.021[0.800,1.305] 0.9759, 1.005[0.741,1.363]
$48,000 to 62,999 411 (76.71%) 0.1785, 1.203[0.919,1.575] 0.1503, 1.264[0.919,1.738]
≥ $63,000 443 (73.25%)
Expected payer (analysis: versus self-pay)
Medicare 1078 (73.71%) 0.1881, 1.285[0.885,1.866] 0.0002, 2.491[1.542,4.023]
Medicaid 184 (84.37%) 0.0005, 2.473[1.487,4.114] 0.0004, 2.788[1.575,4.934]
Private 700 (81.44%) 0.0005, 2.011[1.356,2.981] <0.001, 2.549[1.619,4.013]
Self-pay 97 (68.58%)
No charge 5 (100%) 0.9748, >999[<0.001,>999]
Other 34 (54.80%) 0.0601, 0.555[0.301,1.025] 0.8883, 0.950[0.468,1.931]