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.
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 analyze the monitoring results of iodized salt in Guyuan of Ningxia,and to provide a basis to prevent and control iodine deficiency disorders.Method Descriptive epidemiological method was used to analysis the data of iodized salt from 2008 to 2014,the differences of the qualified rate of iodized salt and the consumption rate of qualified iodized salt in different years were compared longitudinally.Results From 2008 to 2014,the residents iodized salt qualified rate was 96.95％ (9 918/10 230),ranged from 96.03％ to 97.93％ in Guyuan,qualified rate of iodized salt in different years was significantly different (x2 =18.24,P ＜ 0.05);The consumption rate of qualified iodized salt was 96.22％ (9 918/10 308),ranged from 95.18％ to 97.59％,there was significant difference among different years (x2 =38.99,P ＜ 0.05);The median iodine concentration in salt was 31.4 mg/kg,and ranged from 26.2 to 34.9 mg/kg.Conclusions The qualified rate of iodized salt and the consumption rate of qualified iodized salt are kept at a high level.The current iodine content of salt is enough to prevent and control iodine deficiency disorders.