Roberts, I.

trial outcome analysis ordinal treatment effect treatment effect injury scale odds ratio ratio ordinal analysis patient ordinal outcome analysis study approach prognosis crash brain injury odds ratios crash trial dichotomy model stroke head injury measure favourable outcome treatment effects extracranial injury power dichotomy approach murray gd disability brain roozenbeek result steyerberg ew pupillary reactivity prognostic regression glasgow outcome scale favourable glasgow information density stroke trials recovery dichotomou example increase simulation studies baseline odds model table unfavourable design covariate adjustment unfavourable outcome extracranial adjustment murray steyerberg reactivity information covariate glasgow coma scale analyses pupillary dichotomized impact statistic outcome scale future trials odds assumption regression model tbi trials research corticosteroid butcher i teasdale gm randomised