ABSTRACT
Objective@#To understand the iodine nutritional status of residents in the newly identified high iodine and non-high iodine areas in Puyang, and to provide evidence for relevant departments to adjust the iodine supplementation policy.@*Methods@#According to the survey results of drinking water iodine content in 2017, in 2018 stratified and systematic sampling methods were used to extract 25 villages in the newly identified high iodine areas and non-high iodine areas in Puyang City. Each village surveyed 40 children and 20 pregnant women, the urinary iodine content of the subjects and the salt iodine content at their home were measured, and the thyroid volume of children in 10 villages in high iodine and non-high iodine areas was measured.@*Results@#In high iodine areas and non-high iodine areas, the household salt samples collected were 1 357 and 1 544, respectively, the iodized salt coverage rate was 87.91% (1 193/1 357) and 85.62% (1 322/1 544), respectively, and the difference was not statistically significant (χ2 = 3.291, P > 0.05). A total of 1 028 children and 329 pregnant women in high iodine areas were investigated, their median urinary iodine content was 337.0 and 289.0 μg/L, respectively; a total of 1 041 children and 503 pregnant women in non-high iodine areas were investigated, their median urinary iodine content were 310.0 and 265.0 μg/L, the differences of the urinary iodine content between high iodine and non-high iodine areas were statistically significant (Z = -3.825, -2.795, P < 0.05). Thyroid volume was measured in 407 children in high iodine areas and 423 children in non-high iodine areas. The thyroid enlargement rate was 8.85% (36/407) and 3.78% (16/423), respectively, and the difference was statistically significant (χ2 = 9.053, P < 0.05).@*Conclusions@#The iodine nutrition levels of children and pregnant women in high iodine areas are higher than those in non-high iodine areas. Iodized salt should be stopped supplying in high iodine areas as soon as possible. In non-high iodine areas, the feasibility of reducing the iodine concentration of iodized salt should be investigated to ensure the iodine nutrition level of local residents.
ABSTRACT
Objective To understand the iodine nutritional status of residents in the newly identified high iodine and non-high iodine areas in Puyang,and to provide evidence for relevant departments to adjust the iodine supplementation policy.Methods According to the survey results of drinking water iodine content in 2017,in 2018 stratified and systematic sampling methods were used to extract 25 villages in the newly identified high iodine areas and non-high iodine areas in Puyang City.Each village surveyed 40 children and 20 pregnant women,the urinary iodine content of the subjects and the salt iodine content at their home were measured,and the thyroid volume ofchildren in 10 villages in high iodine and non-high iodine areas was measured.Results In high iodine areas and non-high iodine areas,the household salt samples collected were 1 357 and 1 544,respectively,the iodized salt coverage rate was 87.91％ (1 193/1 357) and 85.62％ (1 322/1 544),respectively,and the difference was not statistically significant (x2 =3.291,P ＞ 0.05).A total of 1 028 children and 329 pregnant women in high iodine areas were investigated,their median urinary iodine content was 337.0 and 289.0 μg/L,respectively;a total of 1 041 children and 503 pregnant women in non-high iodine areas were investigated,their median urinary iodine content were 310.0 and 265.0 μg/L,the differences of the urinary iodine content between high iodine and non-high iodine areas were statistically significant (Z =-3.825,-2.795,P ＜ 0.05).Thyroid volume was measured in 407 children in high iodine areas and 423 children in non-high iodine areas.The thyroid enlargement rate was 8.85％ (36/407)and 3.78％ (16/423),respectively,and the difference was statistically significant (x2 =9.053,P ＜ 0.05).Conclusions The iodine nutrition levels of children and pregnant women in high iodine areas are higher than those in non-high iodine areas.Iodized salt should be stopped supplying in high iodine areas as soon as possible.In non-high iodine areas,the feasibility of reducing the iodine concentration of iodized salt should be investigated to ensure the iodine nutrition level of local residents.