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.

The objectives of this research are ; 1) to study the knowledge about healthy food;2) to study the attitude towards consumption of healthy food;3) to study the relationship between the individual of personal factor and health factor and 4) to study relationship between knowledge and attitude towards of healthy food of high school teacher at Nonthaburi that influence their behaviors. Questionnaires were used as a tool for collecting the data and the data was analyzed using percentage mean standard deviation t-test f-test and Pearson correlation (r) Most of the responders of this research are female. Age group is between 51-60 years old. Height group is between 151-160 centimeters. Weight group is between 51-60 kilograms. The majority of their salaries are between 28001-33000 Baht. The level of personal sickness is low. The level of understanding of how to consume healthy food is high. The attitude of consuming healthy food is high level. But the behavior of consuming healthy food is mostly at moderate level According to the study of relationship between the individual of personal factor and health care factor. The results are: there is relationship between sex and behavior of consuming healthy food statistically significant at the .05 level. Moreover the study of relationship between the knowledge and attitude of consuming healthy food of high school teacher that impact to their behavior show knowledge and attitude have relationship to behavior to consume healthy food statistically significant at the .05 level

The objectives of this research were to study the snack consumption behavior of vocational education students certificates level as relate to sex age education level income knowledge of snacks and to study relationship of different levels of knowledge of snacks to sex age and education level of vocational education students certificate level. Sample of 267 home economics students ages 16-18 years home in Kanchanaburi Suphanburi and Nakhonphathom were randomly selected by stratified random sampling. All data were colleted by questioners and analyzed through percentage mean standard education chi – square T – test and F – test. The results of this study indicated that the snack consumption behavior of vocational education certificate level studied in the western Region Vocational Education Institutes had medium level of knowledge about snack. Sex age education level and different income were not significantly related to snack consumption behavior. Different sex and age did not contribute to knowledge levels about snacks.