The first stage of the analysis was designed to identify variables that differentiated obese and non-obese groups of patients. Fisher's Exact Test was used to evaluate differences on categorical variables. A t test for independent samples served the same purpose for continuous variables. The variables examined in the analysis were patient demographics, IQ, disease severity and treatment, substance use and other psychiatric characteristics, and behavioral performance (median reaction time) and anterior and posterior region CNV amplitude during the time estimation task. The results of these analyses are presented in Tables 1 and 2.
