ABSTRACT
Objective:To analyze and compare the salt iodine content and iodine nutrition status of pregnant women in Ningxia Hui Autonomous Region (Ningxia for short), and to provide basis for formulation of prevention and control measures.Methods:From 2017 to 2020, 100 pregnant women were surveyed each year in 22 counties (cities, districts) in Yinchuan, Shizuishan, Wuzhong, Guyuan and Zhongwei of Ningxia, salt samples and urine samples were collected for salt iodine and urinary iodine detection.Results:Totally 8 807 salt samples were collected, the median salt iodine was 24.6 mg/kg. The qualified rate of iodized salt was 91.59% (7 838/8 558), the coverage rate of iodized salt was 97.17% (8 558/8 807), and the consumption rate of qualified iodized salt was 89.00% (7 838/8 807). The consumption rate of qualified iodized salt increased year by year (χ 2trend = 248.47, P < 0.001). There were statistical differences in salt iodine levels in different years and regions ( H = 259.14, 37.09, P < 0.001). Totally 8 107 urine samples were collected, the median urinary iodine of pregnant women was 165.00 μg/L, which reached the appropriate level. The median and composition of urinary iodine were statistically different in different regions and pregnancies ( H = 28.87, 17.91, P < 0.001; χ 2 = 85.89, 20.59, P < 0.05). Conclusions:The coverage rate of iodized salt among pregnant women in Ningxia is high, and the urinary iodine level is generally in a suitable state. However, for pregnant women at risk of iodine deficiency, special attention should be paid and targeted iodine supplementation measures should be taken.
ABSTRACT
Objective To understand the iodine content of drinking water in Ningxia,and provide a basis for promoting scientific iodine supplementation.Methods In 2017,22 counties (cities,districts) of Ningxia Hui Autonomous Region were surveyed by township (town,street office) as the unit.Water samples were collected and iodine content was detected according to the unified centralized water supply,mixed water supply and all the scattered water supply methods.Among them,the investigation at township (town and street office) level found that the median of iodine in water was ＞ 10 μg/L,and then the water samples were collected in administrative villages (neighborhood committees) and the content of iodine in water was detected.Results A total of 242 townships (town,street office) were surveyed at the township level water iodine,and a total of 1 048 water samples were collected,the median water iodine was 6.6 μg/L,the range was 0.0-97.8 μg/L.There were 75 townships with a median water iodine ＞ 10 μg/L,and an administrative village level water iodine survey was conducted.A total of 1 169 water samples were collected,the median water iodine was 14.5 μg/L,and the range was 0.0-97.4 μg/L.The median water iodine at the township level,unified centralized water supply,mixed water supply,and all the scattered water supply was 6.9,6.8,and 4.5 μg/L,respectively.The difference was statistically significant (x2 =7.08,P ＜ 0.05).The median water iodine at the administrative village level,unified centralized water supply,mixed water supply,and all the scattered water supply was 15.8,8.4,and 11.6 μg/L,respectively.The difference was statistically significant (x2 =35.23,P ＜ 0.05).Conclusion The iodine content of drinking water in Ningxia residents is low,which is consistent with the fact that Ningxia is in the iodine deficient area.
ABSTRACT
Objective@#To understand the iodine content of drinking water in Ningxia, and provide a basis for promoting scientific iodine supplementation.@*Methods@#In 2017, 22 counties (cities, districts) of Ningxia Hui Autonomous Region were surveyed by township (town, street office) as the unit. Water samples were collected and iodine content was detected according to the unified centralized water supply, mixed water supply and all the scattered water supply methods. Among them, the investigation at township (town and street office) level found that the median of iodine in water was > 10 μg/L, and then the water samples were collected in administrative villages (neighborhood committees) and the content of iodine in water was detected.@*Results@#A total of 242 townships (town, street office) were surveyed at the township level water iodine, and a total of 1 048 water samples were collected, the median water iodine was 6.6 μg/L, the range was 0.0-97.8 μg/L. There were 75 townships with a median water iodine > 10 μg/L, and an administrative village level water iodine survey was conducted. A total of 1 169 water samples were collected, the median water iodine was 14.5 μg/L, and the range was 0.0-97.4 μg/L. The median water iodine at the township level, unified centralized water supply, mixed water supply, and all the scattered water supply was 6.9, 6.8, and 4.5 μg/L, respectively. The difference was statistically significant (χ2 = 7.08, P < 0.05). The median water iodine at the administrative village level, unified centralized water supply, mixed water supply, and all the scattered water supply was 15.8, 8.4, and 11.6 μg/L, respectively. The difference was statistically significant (χ2 = 35.23, P < 0.05).@*Conclusion@#The iodine content of drinking water in Ningxia residents is low, which is consistent with the fact that Ningxia is in the iodine deficient area.