Table 2.
Patient Injury Characteristics Stratified by SES Quartile
| Median Household Income Quartile | ||||
|---|---|---|---|---|
| Q1 | Q2 | Q3 | Q4 | |
| Type of Injury, n (%) | ||||
| Blunt | 69,691 (83.25)‡ | 62,044 (90.01) | 57,653 (92.37) | 49,887 (94.91) |
| Penetrating | 14,023 (16.75) | 6,888 (9.99) | 4,760 (7.63) | 2,675 (5.09) |
| Year of Admission, n (%) | ||||
| 2003 | 10,248 (12.24)‡ | 9,172 (13.31) | 8,975 (14.38) | 6,808 (12.95) |
| 2004 | 12,885 (15.39) | 10,014 (14.53) | 7,991 (12.80) | 7,472 (14.22) |
| 2005 | 10,117 (12.09) | 8,274 (12.00) | 8,178 (13.10) | 6,933 (13.19) |
| 2006 | 11,869 (14.18) | 9,281 (13.46) | 8,746 (14.01) | 7,382 (14.04) |
| 2007 | 12,585 (15.03) | 8,911 (12.93) | 8,031 (12.87) | 7,301 (13.89) |
| 2008 | 13,164 (15.72) | 11,625 (16.86) | 9,732 (15.59) | 7,751 (14.75) |
| 2009 | 12,846 (15.35) | 11,655 (16.91) | 10,760 (17.24) | 8,915 (16.96) |
| Mortality, n (%) | 3,510 (4.19)† | 2,571 (3.73) | 2,287 (3.66) | 1,657 (3.15) |
| Mean ISS, (interquartile range) | 13.8 (9–17)‡ | 13.8 (9–17) | 13.8 (9–17) | 13.6 (9–16) |
| Charlson Comorbidity Index (CCI), n (%) | ||||
| 0 | 65,295 (78.0)‡ | 53,669 (77.86) | 49,142 (78.74) | 41,666 (79.27) |
| 1 | 11,721 (14.0) | 9,767 (14.17) | 8,693 (13.93) | 7,051 (13.41) |
| 2 | 3,662 (4.38) | 3,085 (4.46) | 2,543 (4.07) | 2,133 (4.06) |
| 3–15 | 3,036 (3.63) | 2,411 (3.50) | 2,035 (3.26) | 1,712 (3.26) |
ISS=Injury Severity Score
*
p<0.05
†
p<0.01
‡
p<0.001