a trend towards significancep = 0.09
The mean age of participants in the TOXO+ group was significantly higher than the mean age in the TOXO− group ( X 2 = 4.09, p = 0.04), and we also detected a trend towards significance for more years of education ( t = 1.70, p = 0.09) and higher Intelligence Quotient ( t = 1.85, p = 0.07) in the TOXO+ group when compared to the TOXO−.