Table 1.
Characteristics of the population in the Arizona State Trauma Registry during 2008–2011 by payer.
| Variables | Self-pay (n=10,697) | AHCCCS (n=31,177) | Medicare (n=10,418) | Private (n=28,143) | χ2 (p-value) |
|---|---|---|---|---|---|
| Age of the patient (+SD) in years | 30.4 (14.5) | 27.8 (17.3) | 72 (14.9) | 35.6 (20.1) | p<0.001 |
| Male (%) | 8,100 (75.7) | 21,042 (67.5) | 5,367 (51.5) | 17,921 (63.7) | p<0.001 |
| Non-Hispanic White (%) | 5,029 (47.0) | 12,676 (40.7) | 8,428 (81.0) | 20,175 (71.7) | - |
| Hispanic (%) | 4,306 (40.3) | 11,875 (38.1) | 1,304 (12.5) | 6,167 (21.9) | p<0.001 |
| American Indian/Alaskan Native (%) | 687 (6.4) | 4,598 (14.8) | 417 (4.0) | 962 (3.4) | - |
| African American/Black (%) | 675 (6.3) | 2,028 (6.5) | 269 (2.6) | 839 (3.0) | - |
| Income <=$34,000 (%) | 2,912 (27.22) | 10,521 (33.75) | 2,039 (19.57) | 3,704 (13.16) | - |
| Income >$34,000 <= $45,000 (%) | 3,185 (29.77) | 10,084 (32.34) | 3,351 (32.17) | 7,752 (27.55) | p<0.001 |
| Income >$45,000 <= $55,000 (%) | 2,483 (23.21) | 6,275 (20.13) | 2,643 (25.37) | 6,593 (23.43) | - |
| Income >$55,000 (%) | 2,117 (19.79) | 4,297 (13.78) | 2,385 (22.89) | 10,094 (35.87) | - |
| Injury severity score (ISS) <=8 (%) | 7,547 (70.6) | 19,959 (64.0) | 4,618 (44.3) | 17,645 (62.7) | - |
| ISS 9–15 (%) | 1,972 (18.4) | 6,764 (21.7) | 3,332 (32.0) | 6,448 (22.9) | p<0.001 |
| ISS 16–24 (%) | 624 (5.8) | 2,650 (8.5) | 1,632 (15.7) | 2,513 (8.9) | - |
| ISS 25–75 (%) | 554 (5.2) | 1,804 (5.8) | 836 (8.0) | 1,537 (5.5) | - |
| Penetrating trauma (%) | 1,948 (18.2) | 4,726 (15.2) | 465 (4.5) | 1,692 (6.0) | p<0.001 |
| Drug and alcohol use (%) | 4,598 (42.3) | 11,947 (38.3) | 1,557 (15.0) | 5,632 (20.0) | p<0.001 |
| Median total length of stay (IQR) in days | 1.0 (0, 2) | 1.0 (0, 3) | 3.0 (1, 6) | 1.0 (0, 3) | - |
AHCCCS, Arizona Health Care Cost Containment System; ISS, injury severity score