The SGA is recommended by National Kidney Foundation Kidney / Disease Outcomes Quality Initiative(K/DOQI) as an instrument for assessing the nutritional status of dialysis patients . It is a semiquantitative scoring system based on history and physical examination. The history consists of five components: weight loss during the preceding 6 months, gastrointestinal symptoms, food intake, functional capacity, and comorbidities. Each of these features is scored separately as A, B, or C, reflecting well-nourished to severely malnourished categories. The physical examination consists of 2 components: loss of subcutaneous fat and muscle wasting. These two components are classified in terms of the three major SGA scores: A, well nourished; B, mild to moderate malnutrition; and C, severe malnutrition.