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Table 3 Model performance for ICISS to predict ICU admission, linked hospitalisation and mortality data, NSW, 1 January 2010 to 30 June 2014

From: Identification and internal validation of models for predicting survival and ICU admission following a traumatic injury

 

Multiplicative-injury ICISS

Single worst-injury ICISS

ICU admission1

Bootstrap-adjusted AIC (95% CI)

Bootstrap-adjusted R2 (95% CI)

Bootstrap-adjusted H-L statistic (95% CI)

Bootstrap-adjusted concordance (95% CI)

Bootstrap-adjusted AIC (95% CI)

Bootstrap-adjusted R2 (95% CI)

Bootstrap-adjusted H-L statistic (95% CI)

Bootstrap-adjusted concordance (95% CI)

Model 1: Age group, gender

175,710 (173,800, 177,367)

0.161 (0.156, 0.164)

1267 (1134, 1391)

0.763 (0.759, 0.766)

183,437 (181,589, 185,142)

0.119 (0.115, 0.123)

1007 (892, 1121)

0.745 (0.741, 0.748)

Model 2: Age group, gender, CCI group

173,093 (171,178, 174,762)

0.175 (0.170, 0.179)

560 (468, 652)

0.777 (0.773, 0.780)

181,083 (179,267, 182,822)

0.132 (0.127, 0.135)

520 (427, 605)

0.759 (0.756, 0.763)

Model 3: Age group, gender, CCI group, mental health, drug, alcohol

169,268 (167,500, 170,857)

0.195 (0.190, 0.199)

1083 (959, 1210)

0.809 (0.806, 0.812)

177,355 (175,605, 178,961)

0.152 (0.147, 0.156)

1333 (1170, 1495)

0.793 (0.790, 0.796)

Model 4: Age group, gender, CCI group, mechanism

162,265 (160,406, 163,818)

0.232 (0.228, 0.237)

809 (707, 897)

0.841 (0.839, 0.844)

171,083 (169,292, 172,649)

0.185 (0.182, 0.190)

619 (541, 699)

0.824 (0.822, 0.826)

Model 5: Age group, gender, CCI group, nature

160,529 (158,753, 162,033)

0.241 (0.237, 0.246)

589 (512, 661)

0.849 (0.847, 0.852)

168,908 (167,072, 170,450)

0.197 (0.193, 0.201)

617 (538, 698)

0.833 (0.830, 0.835)

Model 6: Age group, gender, CCI group, mechanism, nature

158,863 (157,039, 160,357)

0.250 (0.246, 0.255)

555 (468, 632)

0.855 (0.852, 0.857)

166,481 (164,735, 168,032)

0.210 (0.206, 0.214)

366 (301, 436)

0.839 (0.837, 0.842)

Model 7: Age group, gender, CCI group, mental health, drug, alcohol, mechanism, nature

158,474 (156,669, 159,970)

0.252 (0.248, 0.257)

572 (489, 650)

0.856 (0.854, 0.859)

165,988 (164,216, 167,490)

0.213 (0.209, 0.217)

421 (356, 492)

0.841 (0.839, 0.844)

  1. aCCI group Charlson Comorbidity Index, mental health mental health conditions, alcohol alcohol misuse and dependence, drug drug-related dependence, mechanism injury mechanism, nature nature of injury
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Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine

ISSN: 1757-7241