Study and analysis on Vitamin A deficiency for children of school age from 7 to 12 years old in Zhejiang Province

Objecfive The study was designed to study and analyze Vitarnin A (Val) deficiency for children of school age from 7 to 12 years in Zhejiang Province．Methods There Were 1799 children of school age from 7 to 12 years old in Zheiang Province taken as the object of study．And their plasma VA was tested，and medical physical examination and haematoglobin (Hb) decermination conducted at the sanle time．Results The plasma VA for children of school age averaged (34.02±9.92)μg/dL．There was no case of clinical VA deficiency (VAD)，while the incidence rate of sub-clinical vitamin A deficiency (SVAD) were 5.2％，and that of suspected SVAD 35.7％ The difference of plasma VA level among different age groups and between urban and rural areas was signficant，and the difference of prevalence rate of SVAD between urban and nlral areas．As well as that of suspected SVAD between urban and rural areas and between male and female，was also significant．Among different groups of plasma VA level,the difference of anemia prevalence was not remarkable，but the difference of hypergravity rate was notable．Conclusion VAD for children of school age in Zhejiang Province has been rare,but SVAD still exists The children with SVAD and suspected SVAD should be the main object for future prevention and control of vitamin A deficiency