at the limit of significancep = 0.05
PCB 153 concentration was positively associated to AD concentration at the limit of significance in the crude model (β = 0.045, CI = 0.0002 to 0.090, p = 0.05), and this relationship was significant in the adjusted model (β = 0.054, CI = 0.010 to 0.098, p = 0.02).