| ObjectiveTo realize the content and influencing factors of calcium, iron, zinc, copper,magnesium and selenium in hair of primary and secondary students in Jingyu andDongliao and explore the interaction between the mineral elements and morphologicalindex (height, weight, bust, and sitting height) to provide reliable theoretical basis forprimary and secondary students’ dietary and prevent the occurrence of mineraldeficiency.MethodsAdopting the method of stratified cluster sampling, we invested675primary andsecondary students by unified design of the questionnaire and uniform traininginvestigators, to realize basic information and eating habits of them. ICP-MS wasapplied to test the content of six elements in hair samples.Used Epidata3.0to establishthe database and applied SPSS13.0statistical software to statistical analysis. Measure-ment data to describe the central tendency and dispersion trend M, Q orX±S; groupswere compared using the rank sum test, the correlation analysis between the twovariables was by Pearson correlation.The description of count data used rate orconstituent ratio, the groups were compared by χ2test, univariate analysis used χ2test,Multivariate analysis used non-conditional logistic regression.Results1. This study investigated675primary and secondary school students, including333boys (49.3%) and342girls (50.7%); the range of age is5to16years, mean ofage is10.0±4.0years old.2. In675primary and secondary school students, the deficiency rate of calcium is33.0%; iron is22.4%; zinc is16.6%; copper is0.6%;magnesium is13.2%; selenium is41.0%.3.The distribution of calcium, iron, zinc,magnesium and selenium,s content with different gender have statistically significant(P＜0.05) and the content of calcium, iron, zinc and magnesium in girls’ hair arehigher than boys’, boys’ hair selenium content is higher than girls’, the difference ofcopper content distribution is not statistically significant (P＞0.05); calcium, iron,zinc, magnesium and selenium deficiency rate differences between different gendersare statistically significant (P＜0.05), calcium deficiency rate of boys is higher thangirls’, iron deficiency rate of girls is higher than boys’, zinc deficiency rate of girls ishigher than boys’,magnesium deficiency rate of boys is higher than girls’, seleniumdeficiency rate of girls is higher than boys’.4. Calcium, iron, zinc, copper, magnesiumand selenium content distribution differences between different age groups arestatistically significant (P＜0.05), age and hair samples’calcium, iron, zinc, copperand magnesium content is positively related. Age and hairs’ selenium content isnegatively correlated; calcium, zinc, magnesium and selenium deficiency ratedifferences between different age groups are statistically significant (P＜0.05).5.Calcium, zinc, magnesium and selenium content in body is positively related to height,weight and bust (P＜0.05), iron and bust have a positive correlation (P＜0.05), height,weight have no correlation (P＞0.05), copper and height, weight, bust had nocorrelation (P＞0.05).6. The influencing factors of calcium deficiency in primary andsecondary school students showed that the risk of calcium deficiency in grils is lowerthan boys’; the risk of calcium deficiency in age from11to13,14to16are lowerthan age from5to7, the value of OR are0.540and0.560. The influencing factor ofiron deficiency showed that the risk of iron deficiency in grils is higher than boys’,iron deficiency rate of girls is1.650times than boys’. The influencing factor of zincdeficiency showed that the risk of zinc deficiency in age from11to13,14to16arelower than age from5to7, the value of OR are0.447and0.256; living in thecountryside is lower than living in the city, the value of OR is0.365. The influencingfactor of magnesium deficiency showed that the risk of magnesium deficiency in grils is lower than boys’, the value of OR is0.246; the risk of magnesium deficiency instudents of age from11to13,14to16are lower than age from5to7, the value of ORare0.176and0.287; the risk of magnesium deficiency in students with high familyincome is lower than low family income, the value of OR is0.630. The influencingfactor of selenium deficiency showed that the risk of selenium deficiency in grils ishigher than boys’, the value of OR is2.082; the risk of selenium deficiency instudents of age from14to16is higher than age from5to7, the value of OR is1.922;the risk of selenium deficiency with living in the countryside is higher than living inthe city, the value of OR is0.825; the risk of selenium deficiency in students with highfamily income is lower than low family income, the value of OR is1.787.Conclusion1. The main element minerals that primary and secondary school students lackwas selenium, calcium and iron.2. Calcium and magnesium deficiency rate of boys ishigher than girls,, iron, zinc and selenium deficiency rate of girls is higher than boy,;calcium, zinc and magnesium deficiency rate of students aged from8to10is highest,selenium deficiency rate of students aged from14to16is highest.3. There was apositive correlation between the content of six elements of mineral and body height,weight, bust, sitting height.4. The risk of calcium and magnesium deficiency in grilsare lower than boys’, iron and selenium are higher than boys’; the risk of calcium,zinc and magnesium deficiency in age from11to13,14to16are lower than age from5to7, selenium deficiency in age from14to16is higher than age from5to7; therisk of zinc deficiency with living in the countryside is lower than living in the city,the risk of selenium deficiency with living in the countryside is higher than living inthe city; the risk of magnesium and selenium deficiency in students with high familyincome are lower than low family income,... |
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