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Table 2 Predictor ranking and prediction performance in data set A

From: Artificial neural networks improve early outcome prediction and risk classification in out-of-hospital cardiac arrest patients admitted to intensive care

Table 2a Table 2b
Rank Predictor AUC No. of variables AUCCV AUCtest
1 Age 0.8188 (±  0.0207) 1 0.708 (± 0.0286) 0.657
2 Time to ROSC 0.8285 (± 0.0256) 2 0.780 (± 0.0113) 0.799
3 First monitored rhythm 0.8319 (± 0.0217) 3 0.820 (± 0.0106) 0.852
4 Previous cardiac arrest 0.8324 (± 0.0238) 4 0.822 (± 0.0169) 0.861
5 GCS motor score 0.8335 (± 0.0225) 5 0.832 (± 0.0229) 0.863
6 Dose of adrenaline 0.8337 (± 0.0244) 6 0.839 (± 0.0170) 0.826
7 Creatinine 0.8342 (± 0.0221) 7 0.846 (± 0.0117) 0.837
8 Cardiac arrest location 0.8356 (± 0.0234) 8 0.854 (± 0.0119) 0.857
9 Previous AMI 0.8358 (± 0.0227) 9 0.843 (± 0.0129) 0.835
10 Diabetes 0.8358 (± 0.0221) 10 0.840 (± 0.0182) 0.844
11 Length 0.8358 (± 0.0176) 11 0.848 (± 0.0173) 0.869
12 Time to Advanced CPR 0.8360 (± 0.0189) 12 0.853 (± 0.0142) 0.870
13 pH 0.8363 (± 0.0260) 13 0.851 (± 0.0266) 0.880
14 Platelets 0.8363 (± 0.0234) 14 0.849 (± 0.0079) 0.875
15 Bystander witnessed arrest 0.8366 (± 0.0190) 15 0.852 (± 0.0188) 0.886
    All 54 0.852 (± 0.0172) 0.891
  1. The ranking of the variables in the data set was calculated by their individual effect on the AUC when subtracted from the overall model. The AUC values in Table 2a represent how much the performance decreases when the corresponding variable is excluded from the model
  2. The AUC values in Table 2b show how much the prediction performance of the model increase by adding one variable at the time (based on their relative importance in Table 2a) to the model. AUCCV values represent the training set, and AUCtest the test set. When using all available variables at patient admission to intensive care, the AUC was 0.891, indicating an excellent performance of predicting long-term functional outcome
  3. AUC area under the curve, ROSC return of spontaneous circulation, GCS Glasgow Coma Scale, AMI acute myocardial infarction, CPR cardiopulmonary resuscitation