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Table 4 IMP-ICDX regression coefficients

From: IMP-ICDX: an injury mortality prediction based on ICD-10-CM codes

Predictor Coefficient Robust std. error Z P > |Z| 95% CI
WMDP1 C1 4.9695 0.1198 41.49 0.000 4.7348–5.2043
WMDP2 C2 2.2315 0.2467 9.04 0.000 1.7479–2.7151
WMDP3 C3 0.4111 0.1215 3.38 0.001 0.1730–0.6492
WMDP4 C4 0.3107 0.1418 2.19 0.028 0.0328–0.5885
WMDP5 C5 0.3905 0.1318 2.96 0.003 0.1322–0.6488
WMDP1 × WMDP2 C6 − 0.7551 0.1428 − 5.29 0.000 − 1.0349 to − 0.4753
Same region C7 − 0.2120 0.0488 − 4.34 0.000 − 0.3076 to − 0.1163
ln (NBR) C8 − 2.4871 0.1942 − 12.80 0.000 − 2.8678 to − 2.1064
NBR0.382 C9 2.6147 0.2331 11.22 0.000 2.1578–3.0715
Constant C0 − 10.7138 0.2630 − 40.73 0.000 − 11.2293 to − 10.1983
  1. Coefficients for IMP-ICDX model were recalculated based on all 158,956 patients not used to calculate WMDP and IMP-ICDX values. WMDP1 indicates the worst injury (greatest WMDP value), WMDP2 the second worst injury, and so on. WMDP1 × WMDP2 is the product of the WMDP values for the 2 worst injuries. Same region is equal to 1 if the two worst injuries are in the same body region, 0 otherwise. NBR is the number of body regions for each injured patient. “ln” indicates natural logarithm