The purposes of this research are to investigate 1) personal factors contributing to the longevity of elderly 2) the dietary behavior of long-living elderly and 3) the relationship between personal factors such as:gender age BMI and dietary behavior. The samples are 29 of long-living elderly with ages more than 80 years old living in Tambon Tha Phi Liang Muang district Suphanburi province. The long-living elderly must be able to answer the questions. The statistics used to analyze data in this research are frequency percentage and Chi-Square (χ2). The data were analyzed using statistical tools. As for thier dietary behavior it was found that most long-living elderly usually have five food groups:eggs UHT milk paddy morning glory cabbage watermelon papaya and vegetable oils. They purchased these five groups of food for consumption. Boiling was the main method of cooking. They usually stored food in the refrigerator to keep them fresh. The relationship between personal factors and dietary behavior could be classified into 5 areas : types of food frequency of consumption sources of food methods of cooking and methods of food preservation. The finding found that gender age and BMI were related with food consumption. However cooking (boiling) was not related with statistically significant level at .05.

The objectives of this research are ; 1) To study the dietary behavior of patients with Non-Insulin Dependent Diabetic Mellitus (NIDDM) DonToom Hospital NakornPathom Province; 2) To study the environmental factors on knowledge about nutrition and health self care of patients with NIDDM; 3) To study the relationship between dietary behavior and environmental factors nutritional knowledge and self care factors of patients with NIDDM. Questionnaires were used to collect data Data analysis using the number percentage mean standard deviation and Pearson Correlation (r). The results showed that the majority are female between 56-60 years of age married highest education level: completed primary school agricultural occupation monthly income was 5001-10000 Bahts and the majority lived with husband wife and children. The overall environmental factor affected dietary behavior of patients with diabetes at a high level. The nutritional factor affected dietary behavior of patients with diabetes at the highest level. The self care factor affected their dietary behavior at a moderate level. Study of relationship between dietary behavior personal and environmental factor nutritional factor. and self-care factor have relationship at the statistical significance of 0.05.

The purpose of this research was to study the knowledge and nutritional selfcare of elderly people trends to Dementia Case study : Phra Nakhon Sri Ayutthaya District Phra Nakhon Sri Ayutthaya Province and to determine the relationships between personal factors nutritional knowledge perception of physical health status and dietary intake behaviors in these people. The subjects of this study were 122 elderly peoples in this area The medthodology was the assessment interviews of personal factors nutritional knowledge perception of physical health status and dietary intake behaviors. The statistical methods used in this study were the percentage mean value standard deviation Chi-square The study found that 78.7% of the sample was female less than 65 years of age 75.4% of the sample held no regular job and 69.7% were primary school graduate. Test results of Thai Mental State Examination : TMSE showed most of the evaluation criteria of suspected dementia were 21.52 points which were less than 23 points Most samples had good perception of physical health status had good perception of dietary intake behaviors. Comparison of relationship between genders and perception of physical health status and between geners and perception of nutitional knowledge were found to be associated. Compare (5) the relationship between the level of the subjects of education and knowledge of nutrition were found to be associated. Compare the relationship between the level of the samples of behavior in food consumption were found to be associated.