The sample unit of nutrition survey is family. Nutritional survey refers to the investigation of the nutritional status of the population and is an important method to study the nutritional status of the population. Including dietary survey, clinical examination, anthropometry and laboratory examination of nutritional level.
The purpose of nutrition survey is to understand the dietary structure and nutritional status of the population, understand the nutritional problems related to food shortage and excessive consumption, find the nutritional problems related to dietary nutrients, evaluate the development of residents' dietary structure and nutritional status, provide basic information for some comprehensive or thematic research topics related to nutrition, and provide scientific basis for the state to formulate policies and social development plans.
Nutrition survey method
1. Dietary survey: it is to investigate the quantity and quality of energy and various nutrients consumed by the respondents in a certain period of time, so as to evaluate the degree to which the daily nutrition of the respondents is satisfied. The methods used are weighing, bookkeeping, chemical analysis, inquiry and food frequency.
2. Physical fitness measurement: anthropometric data can well reflect the nutritional status, and physical fitness measurement data is a useful index to evaluate the nutritional status of a group or individual. Commonly used measurement indicators are: height (length), weight, upper arm circumference, waist circumference, hip circumference and skin fold thickness.
3. Laboratory detection: Through biochemical experiments, it is found that there is insufficient clinical nutrition, low nutritional reserve level or excessive nutrients in human body. We can grasp the symptoms and dynamic changes of malnutrition earlier and take necessary preventive measures in time.
4. Clinical examination: mainly check the corresponding signs and symptoms of malnutrition. It is a set of inspection methods to understand the nutritional and health status of the body with the help of clinical medical knowledge and sensory or related inspection equipment. Make a clinical diagnosis of normal or abnormal nutrition after examination.