ABSTRACT
Objective To master the level of iodine nutrition among population in Jiangxi province,and to provide a scientific basis for establishing the strategy for prevention and control of iodine deficiency disorders (IDD).Methods Retrospective method was adopted to analyze the goiter rate and frequency distribution of urinary iodine of children aged 8-10,the qualified rate of iodized salt,the coverage rate of iodized salt and the consumption rate of qualified iodized salt in residents of Jiangxi province from 1995 to 2010.The method of correlation analysis was used to analyze the relationship between goiter rate of children (by palpation) and the qualified rate of iodized salt,iodized salt coverage rate and residents consumption rate of qualified iodized salt.Results The goiter rates (measured by the method of palpation) of children aged 8-10 were down from 40.17％(482/1200) in 1995 to 0.80％(16/2000) in 2010(x2 =4.864,P＜ 0.05).The median of urinary iodine of children was higher than 200 μg/L; the proportion of people whose urinary iodine content higher than 300 μg/L was above 25.00％ and the highest propoaion was up to 58.01％ (210/362) between 1995-2010.The minimum median of salt iodine was 17.77 mg/kg in 1995,and 29.30-39.10 mg/kg in other years.The qualified rates of iodized salt,the iodized salt coverage rates and the consumption rates of qualified iodized salt increased from 43.58％(452/1037),86.42％(1037/1200) and 37.67％(452/1200) in 1995 to 97.95％ (1916/1956),99.95％(1956/1957) and 97.90％(1916/1957) in 2010,respectively; there was a growth trend over the years(x2 =5.240,6.118,5.631,all P ＜ 0.05).The goiter rates of children were related to the qualified rates of iodized salt,the iodized salt coverage rates and the consumption rates of qualified iodized salt,and the correlation coefficient(r) was-0.833,-0.881 and-0.918 (all P ＜ 0.05),respectively.Conclusions The level of iodine nutrition among residents in Jiangxi province has already gone beyond the appropriate level,and the iodine concentration in salt should be cut to ensure the appropriate iodine nutrition level among people.
ABSTRACT
Objective To investigate the fluctuation of the iodine deficiency disorders(IDD) through continuous monitoring on it. Methods During 2005-2008, 10 monitoring countis (city,district) of IDD were selected in Jiangxi Province. Five townships were selected in each monitoring county, one school was selected in each townships, and 40 students in 8-10 years old from each school were selected to inspect their thyroid glands and determined the idodine content of salts from their home. Among the 40 students, 20 of which were selected to determine the intelligence quotient(IQ) and 6 of which were selected to determine urine iodine. Thirty pregnant women were also selected to determine the urine iodine in each monitoring county. Twenty students of 5th grade in each school and 5 housewives living nearby the school were selected to carry out the questionnaire survey of health education about IDD. Results Monitoring results showed the average goiter rote of 8-10 years old students was between 2.00% and 4.60% during 2005-2008. The rate of IQ of the students higher than 90 was all above 76% each year. The median of urine iodine of students and pregnant women was higher than 100 μg/L, and the proportion of people whose urine iodine content was lower than 50 μg/L was below 4% each year. The rate of inhabitant taking qualified idodine salt wasn't lower than 95%. The pass rate of the questionnaire survey of health education about IDD was between 11.67% and 43.50% in students and 92.50%-99.60% in housewives. Conclusions The situation of iodine deficiency in Jiangxi Province has been greatly improved, reaching the standard of eliminating IDD.