Objective To explore the association between mild cognitive impairment and plasma homocysteine of Uygurs and hans aged in Xinjiang. Methods A total of 5398 Uygurs and Hans aged 60 years or older were surveyed in south,east and north of Xinjiang by divided-levels,random,cluster sampling approaches a ccording to the DSM-IV( Diagnostic and Statistical Manual of Mental Disorders,forth version). Based on the epidemiological investigation,the case-control anlaysis had been adopted. We selected 314 patients with M...