Background and Objectives : According to Willett, the semi quantitative food frequency questionnaires (SQFFQ) have become the primary method for measuring dietary intake in epidemiological studies. Today, the same portion size used in adults and the elderly at SQFFQ. However, the portion size for the elderly is not the same for adults. We think the dietary intake for the elderly shows smaller portion size than adults for most foods. So we measured habitual use of portion size among the healthy elderly at 84 food items. We investigated nutrient intake for the elderly by nutrition survey wchich surveyed three season\u27s (early summer, fall, winter) duplicated method. Then we developed a SQFFQ for the elderly from their common foods consumption. The SQFFQ format became eight grades for the frequency and five grades the food consumption. To estimate the validity, newly developed of SQFFQ was compared with the three season\u27s duplicated method. Results and Conclusions : As for the validity, the relative difference between SQFFQ value and the duplicated method value was small. The relative difference of principal nutrients (energy, protein, and fat) were less than 5%, and vitamins A, B_1 and B_2 were 20-10%. Especially, there were significant correlations (p<0.01) between SQFFQ and duplicated method for intakes of vitamin B_1, dietary fiber, calcium and potassium. And there were significant correlations (p<0.05) between SQFFQ and duplicated method for the intakes of energy and vitamin B_2. These results suggest that our developed SQFFQ for a dietary survey that consists of 84 foods items, particularly are reliable for dietary assessment in healthy elderly people
