title: Assessment of selenium nutritional status of school-age children from rural areas of China in 2002 and 2012.
abstract: OBJECTIVE
  To assess the selenium nutritional status of 3458 school-age children recruited from rural areas using the China Nutrition and Health Survey 2002 and 2012 (CNHS 2002 and CNHS 2012).
  
  
  METHODS
  The serum selenium concentration was determined by high-resolution inductively coupled plasma mass spectrometry. The prevalence of dietary selenium intake insufficiency was calculated according to the formula suggested by and the estimated average requirements of the new Chinese Dietary Reference Intakes. The percentage of low selenium was based on the cutoff values with a serum selenium concentration below the threshold limit of clinical importance in coronary and cardiovascular diseases (<45 μg/l) and in abnormal physiological functions (<60 μg/l).
  
  
  RESULTS
  The overall median serum selenium concentration was 64.3 μg/l in the CNHS 2002 and 74.2 μg/l in the CNHS 2012. The median calculated dietary selenium intake was 26.7 μg/day in the CNHS 2002 and 33.2 μg/day in the CNHS 2012 together with a 61.1% and 52.8% dietary selenium intake insufficiency in the CNHS 2002 and in the CNHS 2012. In addition, the percentages of low selenium (<45 μg/l and <60 μg/l) were 25.1 and 43.8% in the CNHS 2002 but 9.4 and 25.6% in the CHNS 2012.
  
  
  CONCLUSIONS
  The selenium nutritional status of school-age children was significantly improved in the CNHS 2012 versus the CNHS 2002. However, the health risk for selenium malnutrition in school-age children remains a potential problem affecting children's health.
authors.affiliation: Key Laboratory of Trace Element Nutrition Ministry of Health, National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, China.
authors.forename: X
authors.initials: X
authors.lastname: Liu
authors.affiliation: Key Laboratory of Trace Element Nutrition Ministry of Health, National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, China.
authors.forename: J
authors.initials: J
authors.lastname: Piao
authors.affiliation: Key Laboratory of Trace Element Nutrition Ministry of Health, National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, China.
authors.forename: M
authors.initials: M
authors.lastname: Li
authors.affiliation: Key Laboratory of Trace Element Nutrition Ministry of Health, National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Trace Element Nutrition Ministry of Health, National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, China.
authors.forename: C
authors.initials: C
authors.lastname: Yun
authors.affiliation: Key Laboratory of Trace Element Nutrition Ministry of Health, National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, China.
authors.forename: C
authors.initials: C
authors.lastname: Yang
authors.affiliation: Key Laboratory of Trace Element Nutrition Ministry of Health, National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, China.
authors.forename: X
authors.initials: X
authors.lastname: Yang
mesh_terms: D002648:Child; D002681:China; D003430:Cross-Sectional Studies; D004032:Diet; D005260:Female; D006801:Humans; D008297:Male; D015596:Nutrition Assessment; D009752:Nutritional Status; D018570:Risk Assessment; D012424:Rural Population; D012643:Selenium / Q000008:administration & dosage / Q000097:blood*
chemical_list: D012643:Selenium