“…49 Ong et al performed a secondary analysis of a prospective cohort study of 2,269 patients in Singapore comparing TOR guidelines by Marsden et al, 36 Petrie et al, 50 and Verbeek et al 40 51 Haukoos et al created three decision models to predict "meaningful survival," defined by Glasgow Coma Score (GCS) at hospital discharge, under the premise that previously derived rules have been created for predicting survival, rather than for the outcome of meaningful survival. 52 The first model, to predict survival with a GCS >13, required a witnessed arrest or age <78 years. In a retrospective analysis of 754 patients transported to the Department of Emergency Medicine at Harbor-UCLA Medical Center, this first rule had a positive predictive value of 5% for survival and a negative predictive value of 99.8%.…”