Study On The Relationship Between Nutrition Knowledge,Self-Image And Underweight In Female College Students

Objective:To learn about the status of underweight in female college students,and to explore the relationship between nutrition knowledge,body-image and the formation of underweight,so as to provide scientific basis for formulating corresponding measures to prevent the formation of underweight and improve the physical health of female college students.Methods:The random cluster sampling was used to select female student sample in Wuhan University of Science and Technology.After selecting the included subjects according to the inclusion and exclusion criteria,the CSTF-ST height-weight measuring instrument of tsinghua tongfang was used to measure the height and weight of the subjects.Self-designed questionnaires were used to investigate the demographic information and the knowledge of nutrition related to weight management of female college students.The body image of female college students was investigated by the Multidimensional Body-Self Relations Questionnaire(MBSRQ).After the univariate analysis including t-test,anova and chi-square test,the correlation between multiple possible factors and underweight was analyzed by binary logistic regression.Results:A total of 1486 subjects were selected in this study,and a total of 1479 subjects were eventually investigated after invalid data were removed,with an effective rate of 99.5%.The study found that:(1)The incidence of underweight among female college students was 16.7%.(2)The situation that all the survey subjects master the knowledge related to weight managemen is not optimistic: the knowledge points with accuracy of 60% are less than 1/3,and the main blind spots of knowledge are in the body size judgment method,BMI cognition,thermal energy and nutrient balance,and the identification of weight control recipes.However,the situation of students in the underweight group to master the body shape judgment method and identify the weight control diet was significantly worse than that in the non-underweight group(P<0.05).(3)The proportion of high scores in the total body image score of all subjects was 60.2%,and the proportion of high scores in all dimensions except overweight ranged from46.7% to 74.0%.Among the four dimensions of appearance assessment,body part satisfaction,overweight and self-classification,there were significant differences between the underweight group and the non-underweight group(P<0.05).(4)Students who know "weight loss diet","underweight hazardous to health","taking the right weight control measures" have 36%(OR=0.64,95%CI:0.48-0.84)(P=0.002),48%(OR=0.52,95%CI:0.36-0.75)(P<0.001),36%(OR=0.64,95%CI:0.47-0.88)(P=0.005)lower risk of underweight than the students don’t know the knowledge,that is,students who know the above knowledge have a lower probability of underweight.The students who know the "body size judgment method" have 87% higher risk of underweight than that of those who do not know the knowledge(0R=1.87,95%CI:1.20-2.93)(P=0.006),that is,students who know the knowledge have a higher probability of underweight.(5)Students with high score for appearance assessment have 77% higher risk of underweight than those with low score(0R=1.77,95%CI:1.26-2.48)(P=0.001),that is,students with high score for appearance assessment have a higher probability of low weight;Students with high score for the overweight dimension,the middle and high score for self-classification have 61%(0R=0.39,95%CI:0.23-0.68)(P=0.001),75%(0R=0.25,95%CI:0.17-0.37)(P<0.001),96%(0R=0.04,95%CI:0.02-0.09)(P<0.001)lower risk of underweight than students with low score.Conclusion:The problem of underweight in female college students is prominent,which is twice the number of overweight and obesity.Their level of nutritional knowledge is not optimistic,there are still some blind spots in the knowledge of body size judgment method,BMI cognition,thermal nutrient balance,weight control diet identification,et al.Female college students’ overall satisfaction with body image is general,and the proportion of high groups in such dimensions as appearance evaluation,comfort evaluation,weight loss and self-classification is low.Students who know the weight-related nutrition knowledge,such as "diet for weight loss","health hazards of underweight",and "proper weight control measures",as well as overweight scores andself-categorization scores,are less likely to belong to underweight,while those who know "body size assessment methods" as well as who gets high appearance assessment scores,are more likely to belong to underweight.