Abstract: RADIOIMMUNOASSAY OF SERUM SOD－1 IN THE ELDERLYRen Yu＇an；Lin Baoyuan（Hankou Hospital of Air Force，Wuhan 430012）ABSTRACT A RIA for serum SOD－1 was performed in 168 aged subjects including 47 aged healthy subjects and 121 aged patients as well as in 35 healthy young and adult cases serving as control．The measuringresults are as follows：serum SOD－1 value of 47 aged healthy subjects are 279．42±89．38μg／l，121aged patients are 405．10±181．29μg／l，and 35 yound and adult cases are 185．80±56．44μg／l．Itshows the obvious difference between the aged group and control group．It also shows the obvious difference between the aged healthy subjects and aged patients．in addition，the clinical evaluation is alsodiscussed in the paper．Key words serum suporoxide dismutase（SOD）RIA the elderly