Lack of an association between Paraoxonase 1 gene polymorphisms (Q192R, L55M) and Alzheimer's disease: A meta-analysis

► We performed a meta-analysis to derive a more precise estimation of the relationship. ► This study has the potential to detect small effects in genetic association studies. ► No association was found between the PON1 polymorphisms (Q192R, L55M) and AD.