Table 3 Area Under the ROC Curve for ISS and wISS in the test sample (NTDB 2007-2014)
From: A new weighted injury severity scoring system: better predictive power for adult trauma mortality
ISS | wISS | Increase in AUC | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
ISS groups | # patients | # death | % death | AUC | 95% CI | AUC | 95% CI | |||
All Trauma | Total | 1-74 (all severity) | 915,869 | 36,187 | 4.0 | 0.83 | (0.83-0.83) | 0.83 | (0.83-0.83) | 0.00 |
1-15 | 697,931 | 8,776 | 1.3 | 0.60 | (0.60-0.61) | 0.60 | (0.60-0.61) | 0.00 | ||
16-74 (major) | 217,938 | 27,411 | 12.6 | 0.73 | (0.73-0.74) | 0.76 | (0.76-0.77) | 0.03 | ||
16-24 | 137,083 | 6,181 | 4.5 | 0.52 | (0.52-0.53) | 0.51 | (0.50-0.51) | -0.02 | ||
25-74 (critical) | 80,855 | 21,230 | 26.3 | 0.53 | (0.52-0.53) | 0.68 | (0.67-0.68) | 0.15 | ||
Injury Type | Blunt | 1-74 (all severity) | 770,884 | 28,272 | 3.7 | 0.82 | (0.82-0.82) | 0.82 | (0.82-0.83) | 0.00 |
1-15 | 576,492 | 7,064 | 1.2 | 0.60 | (0.60-0.61) | 0.60 | (0.59-0.60) | 0.00 | ||
16-74 (major) | 194,392 | 21,208 | 10.9 | 0.74 | (0.74-0.74) | 0.77 | (0.76-0.77) | 0.03 | ||
16-24 | 124,796 | 4,995 | 4.0 | 0.50 | (0.49-0.50) | 0.52 | (0.51-0.53) | 0.02 | ||
25-74 (critical) | 69,596 | 16,213 | 23.3 | 0.56 | (0.55-0.56) | 0.68 | (0.68-0.69) | 0.13 | ||
Penatrating | 1-74 (all severity) | 90,474 | 5,910 | 6.5 | 0.88 | (0.88-0.89) | 0.89 | (0.89-0.90) | 0.01 | |
1-15 | 74,895 | 1,077 | 1.4 | 0.61 | (0.59-0.63) | 0.62 | (0.60-0.64) | 0.01 | ||
16-74 (major) | 15,579 | 4,833 | 31.0 | 0.69 | (0.69-0.70) | 0.77 | (0.77-0.78) | 0.08 | ||
16-24 | 7,303 | 885 | 12.1 | 0.59 | (0.57-0.61) | 0.52 | (0.50-0.54) | -0.07 | ||
25-74 (critical) | 8,276 | 3,948 | 47.7 | 0.49 | (0.48-0.50) | 0.73 | (0.71-0.74) | 0.23 | ||
Burn | 1-74 (all severity) | 14,881 | 618 | 4.2 | 0.87 | (0.85-0.89) | 0.87 | (0.85-0.89) | 0.00 | |
1-15 | 13,763 | 244 | 1.8 | 0.73 | (0.70-0.76) | 0.73 | (0.70-0.76) | 0.00 | ||
16-74 (major) | 1,118 | 374 | 33.5 | 0.69 | (0.66-0.72) | 0.70 | (0.67-0.73) | 0.02 | ||
16-24 | 554 | 89 | 16.1 | 0.52 | (0.48-0.56) | 0.51 | (0.47-0.54) | -0.02 | ||
25-74 (critical) | 564 | 285 | 50.5 | 0.49 | (0.46-0.52) | 0.53 | (0.49-0.56) | 0.04 | ||
Isolated/poly | Isolated trauma | 1-74 (all severity) | 262,969 | 5,473 | 2.1 | 0.74 | (0.73-0.75) | 0.75 | (0.74-0.75) | 0.01 |
1-15 | 242,937 | 3,158 | 1.3 | 0.60 | (0.59-0.61) | 0.62 | (0.61-0.63) | 0.01 | ||
16-74 (major) | 20,032 | 2,315 | 11.6 | 0.75 | (0.74-0.76) | 0.76 | (0.75-0.77) | 0.01 | ||
16-24 | 14,452 | 663 | 4.6 | 0.50 | (0.50-0.50) | 0.51 | (0.50-0.53) | 0.01 | ||
25-74 (critical) | 5,580 | 1,652 | 29.6 | 0.50 | (0.50-0.50) | 0.62 | (0.61-0.63) | 0.12 | ||
Polytrauma | 1-74 (all severity) | 652,900 | 30,714 | 4.7 | 0.84 | (0.84-0.84) | 0.84 | (0.84-0.84) | 0.00 | |
1-15 | 454,994 | 5,618 | 1.2 | 0.61 | (0.60-0.62) | 0.61 | (0.60-0.61) | 0.00 | ||
16-74 (major) | 197,906 | 25,096 | 12.7 | 0.74 | (0.73-0.74) | 0.76 | (0.76-0.77) | 0.03 | ||
16-24 | 122,631 | 5,518 | 4.5 | 0.52 | (0.51-0.53) | 0.51 | (0.50-0.51) | -0.02 | ||
25-74 (critical) | 75,275 | 19,578 | 26.0 | 0.54 | (0.54-0.55) | 0.68 | (0.67-0.68) | 0.13 | ||
Age, years | 18-44 | 1-74 (all severity) | 412,218 | 11,713 | 2.8 | 0.86 | (0.86-0.86) | 0.86 | (0.86-0.86) | 0.00 |
1-15 | 321,398 | 2,133 | 0.7 | 0.56 | (0.55-0.57) | 0.56 | (0.55-0.57) | 0.00 | ||
16-74 (major) | 90,820 | 9,580 | 10.6 | 0.76 | (0.75-0.76) | 0.78 | (0.77-0.78) | 0.02 | ||
16-24 | 53,119 | 1,452 | 2.7 | 0.54 | (0.52-0.55) | 0.54 | (0.53-0.56) | 0.01 | ||
25-74 (critical) | 37,701 | 8,128 | 21.6 | 0.57 | (0.56-0.58) | 0.69 | (0.68-0.69) | 0.12 | ||
45-64 | 1-74 (all severity) | 260,211 | 9,212 | 3.5 | 0.84 | (0.84-0.85) | 0.85 | (0.84-0.85) | 0.00 | |
1-15 | 195,857 | 1,885 | 1.0 | 0.58 | (0.57-0.59) | 0.58 | (0.57-0.60) | 0.00 | ||
16-74 (major) | 64,354 | 7,327 | 11.4 | 0.76 | (0.76-0.77) | 0.79 | (0.79-0.80) | 0.03 | ||
16-24 | 41,484 | 1,460 | 3.5 | 0.51 | (0.50-0.53) | 0.51 | (0.50-0.53) | 0.00 | ||
25-74 (critical) | 22,870 | 5,867 | 25.7 | 0.56 | (0.55-0.56) | 0.70 | (0.69-0.71) | 0.14 | ||
65+ | 1-74 (all severity) | 243,440 | 15,262 | 6.3 | 0.79 | (0.78-0.79) | 0.79 | (0.78-0.79) | 0.00 | |
1-15 | 180,676 | 4,758 | 2.6 | 0.59 | (0.58-0.60) | 0.59 | (0.58-0.60) | 0.00 | ||
16-74 (major) | 62,764 | 10,504 | 16.7 | 0.73 | (0.73-0.74) | 0.73 | (0.72-0.74) | 0.00 | ||
16-24 | 42,480 | 3,269 | 7.7 | 0.52 | (0.51-0.53) | 0.52 | (0.51-0.54) | 0.00 | ||
25-74 (critical) | 20,284 | 7,235 | 35.7 | 0.54 | (0.53-0.54) | 0.64 | (0.63-0.65) | 0.10 | ||