| Pericontusional | Nonpericontusional |
---|
ICP | 0.165 ± 0.013 | 0.372 ± 0.019 |
Permuted | 0.129 ± 0.016 | 0.265 ± 0.021 |
CPP | 0.134 ± 0.018 | -0.143 ± 0.020 |
Permuted | 0.059 ± 0.021 | -0.111 ± 0.030 |
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aICP, intracranial pressure; CPP, cerebral perfusion pressure. Microdialysis markers (glucose, lactate, pyruvate and glycerol) and ratios (LP ratio and LG ratio) were used as explanatory variables predicting mean ICP/CPP (0 to 60 minutes prior to microdialysis (MD) sample time). In addition, correlations were analyzed after randomly permuting (scrambling) MD data per subject in relation to ICP/CPP to access what remained of correlations if no longer serially related. Negative correlation (modeling positive prediction) is interpreted as "even worse." Data are presented as means ± standard deviation (SD). SD values represent the variation of artificial neural network solutions from 200 separate runs with random initializations.