Objective To study the factors of leukoaraiosis(LA)and analyze the effect of methylenetetrahydrofolate reductase(MTHFR)gene polymorphism on LA.Methods One hundred and thirty-four LA patients admitted to our hospital from January 2015 to March 2016 served as a LA group and 73 healthy elderly people undergoing physical examination served as a control group in this study.Their general clinical data and laboratory parameters were recorded.MTHFR C667 T and A1298 Cwere amplified and their polymorphisms were analy...