Survey On Dietary Calcium Intake Of Medical Students In A University In Xinjiang

Objective: Get a picture of dietary nutritional status of students in a medical university in Xinjiang Province by investigating their dietary calcium intake, and explore the factors influencing the dietary, In order to put forward theoretical basis of improving the nutritional status of students, promoting a better dietary structure, as well as providing a balanced nutrition. Methods: The questionnaire used in this research is made according to Semi-Quantitative Food Frequency Questionnaire(SQFFQ),which is adopted in Chinese Residents Dietary Investigation in 2002. All energy and nutrient intakes are calculated with calculating software. Three consecutive days dietary records(3-DR) are used to test the validity, the second SQFFQ, which is one month apart after the first SQFFQ, are used to test the reliability( SQFFQ1 and SQFFQ2, respectively). Compared these two methods and two researches, which is 3-DR, SQFFQ, and SQFFQ1, SQFFQ2,analyze correlation of the energy and nutrient intakes. Under the premise of relevance,extract 566 students in this medical university by cluster random sampling method, to get a picture of food intake frequency, dietary food and nutrient intake. Results: 1.The relativity of various nutrients intakes presents positive, differences are statistically significant. In SQFFQ1 and SQFFQ2, after log transformation, correlation coefficient varies from 0.803 to 0.923, the highest calcium is 0.923. Energy-adjustment correlations range from 0.698 to 0.863, the highest calcium is 0.863. Validity correlations vary from0.514 to 0.725 by logarithmic transformation in 3-DR and SQFFQ, Energy-adjusted Pearson correlation coefficient ranges from 0.507 to 0.803, the highest calcium is 0.723. 2.Comparing college students’ food intake, the intakes of grains, beans and nuts are higher than food pyramid, students’ intakes of vegetables, eggs are the right amount according to food pyramid, the rest food intakes are lower compared with food pyramid. In addition,the intakes of dietary grains, vegetables, beans and eggs of boys are higher than girls, andfruits are lower than girls. 3.The intakes of dietary calcium are 600mg/d, 75.6% of the DRIs. The main source of calcium is plant food; but calcium comes from milk and dairy products counts for 25.61%. Conclusion: The questionnaire is of high reproducibility and validity for medical students in this university, thus, it can be used to assess dietary calcium intake. The dietary patterns of these students have certain local ethnic characteristics, that is, they mainly eat noodles, beef and mutton, supplemented by vegetables, fruits, nuts and milk products, their dietary calcium intakes are below DRIs standard. Students should eat more food rich in calcium to improve comprehensive nutrition and health level.