Box plots of plasma maxima oxidation-reduction potential (ORP) measurements in healthy volunteers and multi-trauma patients. The ORP data pertaining to healthy volunteers is labeled "Controls". The multi-trauma groups were divided into mild trauma with an injury severity score (ISS) < 16 and severe trauma with an ISS ≥ 16. The maximum ORP level was measured for both multi-trauma groups. Outliers (i.e. ± 2 standard deviations) for each group are labeled with a plus sign (+). ORP values are expressed in millivolts (mV). Statistical significance (p < 0.05) versus the control group or ISS < 16 group is indicated with an asterisk (*) or number sign (#), respectively.