RESUMO
In order to assess the five-year external quality control programs for clinical chemistry tests of an aviation industrial infirmary, this study was done using data files related to commercial control sera in 1992-1996 by korean Association of Quality Assurance for clinical laboratory. Varlence. index score(VIS) of each items by the our group were calculated using data files of the salute testing method group. The clinical chemistry testing items were Na, K, BUN, Glucose, Ca, Inorgantic phosphorus, Uric acid, Creatinine, Total Bilirubin, Total Protein, Albumin, Total cholesterol, Triglyceride, AST, ALT, ALP, and LDH. The major findings were as follows. 1) The average range of VIS for 5 years was 89-53 for 18 items. This was shown our center is much improved by the external quality control program. 2) There were 6 testing items which VIS is bigger than 100 in 1992 and then appeared decreased trend of VIS until 1996. 3) The most variable items of VIS were K, Na, Albumin, and BUH. 4) The most stable items of VIS were Glucose, Total bilirebin, and LDH.