Fig. 2. Graphic representation of the results of the middle latency auditory evoked response wavelet-derived index Db3d4 (median and 25th, 75th percentiles). Evoked potentials from unresponsive subjects show an Db3d4 value less than zero. Waveforms from awake subjects result in an Db3d4 value greater than zero (P < 0.05). The index is calculated from equation 1using linear coefficients from table 2(pooled data).