Laboratory Medicine ›› 2017, Vol. 32 ›› Issue (12): 1099-1104.DOI: 10.3969/j.issn.1673-8640.2017.12.006

• Orginal Article • Previous Articles     Next Articles

Serum vitamin D nutritional status of children and adolescents in Heilongjiang

CUI Mengzhu, WEN Ying, JIANG Xiaofeng, LIANG Hongyan   

  1. Department of Clinical Laboratory,the Fourth Affiliated Hospital of Harbin Medical University,Harbin 150000,Heilongjiang,China
  • Received:2017-02-14 Online:2017-12-30 Published:2018-01-10

Abstract:

Objective To study vitamin D nutritional status of children and adolescents in Heilongjiang,and to investigate its correlation with sex,age,season and region,so as to provide a reference for vitamin D supplement. Methods A total of 9 502 children and adolescents(1 month old-20 years old) were enrolled. Liquid chromatography tandem mass spectrometry(LC-MS/MS) was used to determine serum 25-hydroxyvitamin D2[25 (OH)D2] and 25-hydroxyvitamin D3[25(OH)D3]. Their sum was the level of serum 25-hydroxyvitamin D [25 (OH)D]. Its correlation with sex,age,season and region was evaluated. Results The level of serum 25(OH) D among 9 502 children and adolescents was 25.12(17.50~33.00)ng/mL,in which 3 122 cases(32.85%)were normal,3 268 cases(34.39%) were subclinically deficient,2 934 cases(30.88%)were deficient,144 cases(1.52%)were seriously deficient,24 cases(0.25%)were overdose,10 cases(0.11%)were toxic,and the overall level was subclinically deficienct. The 25(OH)D2/25(OH)D3 ratios were 0.02(0.01-0.05)for males and 0.02(0.01-0.06)for females(P=0.099). Serum 25(OH)D levels decreased with age,in which that of school-age group was the lowest [19.80(13.25-26.69)ng/mL],and that of baby group was the highest [30.28(29.48-30.92)ng/ mL](P<0.000 1). With the changes of seasons,temperature and sunshine time exist difference,the level of serum 25(OH)D in spring [19.43(12.07-27.68)ng/mL] was the lowest,that in autumn [29.49(23.45-36.43)ng/mL] was the highest,and there was statistical significance among the 4 seasons(P<0.05). Serum 25(OH)D had no statistical significance in different regions of Heilongjiang(P=0.275). Conclusions The level of serum 25(OH)D is low among children and adolescents in Heilongjiang. Children and adolescents over 3 years old should receive reasonable supplement of vitamin D,especially in spring and winter.

Key words: Vitamin D, 25-Hydroxyvitamin D, Children, Adolescents, Age, Season, Liquid chromatography tandem mass spectrometry

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