Fig. 3

Lateralization and localization of the seizure onset zone. Proportion of “lateralizing” cases among all 176 ictal SPECT and proportion of “localizing” cases among the 141 lateralizing ictal SPECT (left), and certainty of the lateralization among the 141 “lateralizing” cases and certainty of the localization among the 107 “localizing” cases (right). The bars represent marginal means estimated by ANOVA with dichotomized injection latency (“early” versus “late” injection) and dichotomized post-injection seizure duration (“long” versus “short” duration) as fixed between-subjects factors. The error bars represent the standard error of the marginal means. The results are shown separately for each combination of dichotomized injection latency and dichotomized post-injection seizure duration