Fig. 1. ( A ) Kaplan-Meier survival curve, illustrating freedom from poor neurologic outcome (death or severe disability) in patients judged to have favorable or unfavorable prognosis on the basis of history, examination, and preliminary investigations. Clinical judgment did not significantly predict outcome. ( B ) Kaplan-Meier survival curve, illustrating freedom from poor neurologic outcome in patients on the basis of presence or absence of normal bispectral index (BIS) parameters. A normal BIS was highly predictive of a good outcome.