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Table 3 Studies on long-term outcome of DOC (disorders of consciousness) patients due to hypoxic or severe brain damage of different origin involving clinical neurophysiological data

From: May clinical neurophysiology help to predict the recovery of neurological early rehabilitation patients?

Study

n

Methods

Results

Zeitlhofer et al. 1991 [24]

22

AEP and SEP

Evoked potentials had no value for the prognosis of “apallic” patients

Goldberg & Karazim 1998 [25]

33

AEP and SEP

AEP and SEP predicted outcome of MCS patients

Howell et al. 2013 [26]

113

SEP

SEP did not predict outcome of hypoxic brain damage survivors

Schorl, Valerius-Kukula & Kemmer 2014 [27]

28

Median SEP

Bliateral loss of SEP did not exclude recovery from severe brain damage

Bagnato et al. 2015 [28]

101

EEG

Reduced EEG amplitudes and delta frequencies were associated with bad clinical outcome (UWS, MCS)

Heinz & Rollnik 2015 [3]

93

EEG, flash VEP, median SEP

Prolongation of wave III (flash VEP), theta or delta EEG rhythm and N20/P25-amplitude reduction (SEP) predicted poor outcome (BI <50)

  1. SEP somatosensory evoked potentials, AEP auditory evoked potentials, EEG electroencephalography, VEP visual evoked potentials, BI Barthel index, UWS unresponsive wakefulness syndrome, MCS minimally conscious state