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Table 1 Univariate associations with race of covariates from the mortality model

From: Racial disparities in mortality after severe traumatic brain injury in childhood: mediators identified by Oaxaca-Blinder decomposition of trauma registry data

Covariate Category Black White p - value
Motor GCS score     < 0.0001
  6 976 (42%) 3891 (54%)  
  5 219 (9%) 537 (7%)  
  4 166 (7%) 362 (5%)  
  3 56 (2%) 154 (2%)  
  2 51 (2%) 103 (1%)  
  1 579 (25%) 1233 (17%)  
  missing 273 (12%) 993 (14%)  
Head AIS score     <  0.0001
  4 1301 (56%) 4416 (61%)  
  5 989 (43%) 2830 (39%)  
  6 27 (0%) 30 (1%)  
ISS score     <  0.0001
  1 to 17 657 (28%) 2429 (33%)  
  18 to 29 1062 (46%) 3176 (44%)  
  >  29 601 (26%) 1668 (23%)  
Number of diagnoses     0.0506
  1 to 4 808 (35%) 2658 (37%)  
  5 to 14 994 (43%) 2908 (40%)  
  >  14 518 (22%) 1707 (24%)  
Systolic blood pressure in ED     <  0.0001
  low 166 (7%) 289 (4%)  
  normal 1887 (81%) 6295 (87%)  
  high 132 (6%) 298 (4%)  
  missing 135 (6%) 391 (5%)  
EMS minutes     <  0.0001
  <  40 674 (29%) 778 (11%)  
  40 to 127 574 (25%) 2626 (36%)  
  >  128 266 (11%) 1254 (17%)  
  missing 806 (35%) 2615 (36%)  
ED disposition     <  0.0001
  dead 84 (4%) 128 (2%)  
  ICU, OR 1840 (79%) 5675 (78%)  
  other admission 320(14%) 1152 (16%)  
  missing 76 (3%) 318 (4%)  
Penetrating injury     <  0.0001
  no 243 (10%) 227 (3%)  
  yes 2077 (90%) 7046 (97%)  
Protective devices     0.0002
  none 1894 (82%) 5671 (78%)  
  some 426 (18%) 1602 (22%)  
insurance     <  0.0001
  commercial 663 (29%) 4101 (56%)  
  non-commercial 1611 (69%) 3052 (42%)  
  missing 46 (2%) 120 (2%)  
Age group     <  0.0001
  infant 505(22%) 1313 (18%)  
  toddler 228 (10%) 633 (9%)  
  child 694 (30%) 2305 (32%)  
  teen 717 (31%) 2618 (36%)  
  missing 176 (8%) 404 (6%)  
Hospital bed size     <  0.0001
  <  200 157 (7%) 533 (7%)  
  201–400 806 (35%) 2319 (32%)  
  401–600 512 (22%) 2164 (30%)  
  >  600 845 (36%) 2257 (31%)  
Teaching status     <  0.0001
  university 1800 (78%) 5156 (71%)  
  community 443 (19%) 1756 (24%)  
  non-teaching 64 (3%) 293 (4%)  
  missing 68 (1%) 13 (1%)  
Self-transportation     0.0004
  no 1875 (81%) 5624 (77%)  
  yes 445 (19%) 1649 (23%)  
  1. AIS Abbreviated Injury Scale, ED emergency department, EMS emergency medical services, GCS Glasgow Coma Scale, ICU intensive care unit, ISS injury severity scale, OR operating room
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