OBJECTIVE: To investigate the prevalence of chronic kidney disease (CKD) in the very elderly community-dwelling subjects,and to evaluate their nutritional and mental health status.METHODS: A stratified cluster random sampling method was used in this study comprising 436 men aged 80 years above from six communities in Feng-tai District, Beijing City.After screening the subjects with CKD, the risk of malnutrition was assessed by the Mini Nutritional Assessment-Short Form (MNA-SF) combined with anthropometric measurements and biochemical markers, and the mental health condition was measured by the Hopkins Symptoms Check List-10 (HSCL-10).