The mean, standard deviation, and range of age, years of education, and mFD of OUD and HC subjects are listed in Table 1. Age did not significantly differ between groups (t=1.19, df=48, p=0.240). Years of education were significantly lower by 2.5 years in the OUD subjects (t=5.08, df=48, p<0.001) relative to HC. mFD was significantly higher by 0.03 mm in the OUD subjects (t=3.53, df=48, p<0.001) relative to HC. 10 out of the 25 OUD subjects were female and 12 out of the 25 HC subjects were female. A Chi-Square Test determined the groups did not differ significantly in sex (2=0.33, df=1, p=0.569). 16 out of 25 OUD subjects self-reported smoking tobacco products compared to 0 of the 25 HC subjects.
