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目的探讨重庆市8～10岁儿童尿碘的空间分布特征。方法建立2009年重庆市各区县尿碘数据库,利用地理信息系统技术,通过ArcGIS 9.3软件分析重庆市尿碘、<100μg/L、(100～200)μg/L、(200～300)μg/L、>300μg/L比例的空间分布和空间自相关性。结果全局空间自相关性分析表明,重庆市儿童尿碘(Moran’s I=0.0405,P=0.2890)、频数>300μg/L比例(Moran’s I=0.0795,P=0.0952)分布在整体上不存在空间相关性,<100μg/L(Moran’s I=0.2014,P=0.0003)、(100～200)μg/L(Moran’s I=0.1166,P=0.0257)、(200～300)μg/L(Moran’s I=0.1458,P=0.0066)比例分布在整体上存在着空间正相关性。局部空间自相关分析表明,重庆市各区县尿碘中位数存在着低-低关联(江北)、高-低关联(巴南);>300μg/L比例存在低-低关联(渝中、江北)、低-高关联(奉节);<100μg/L比例存在着高-高关联(渝中、江北、大渡口、北碚)、高-低关联(巫山);(100～200)μg/L比例存在着高-高关联(渝中、沙坪坝、九龙坡、江津、江北、璧山)、高-低关联(奉节)、低-高关联(铜梁);(200～300)μg/L比例存在着高-高关联(巫山)、低-低关联(江津、江北、大渡口、璧山)、高-低关联(黔江、大足)。结论重庆市整个区域尿碘总量和>300μg/L比例不存在空间聚集性,<100μg/L、(100～200)μg/L、(200～300)μg/L比例存在着空间聚集性;不同区县尿碘及不同状态比例存在聚集区域。
Objective To investigate the spatial distribution of urinary iodine in children aged 8 ~ 10 in Chongqing. Methods The urinary iodine database was established in all districts and counties of Chongqing in 2009. The data of urinary iodine (<100μg / L, (100-200 μg / L), (200-300 μg / L) ,> 300μg / L ratio of spatial distribution and spatial autocorrelation. Results The global spatial autocorrelation analysis showed that the distribution of urinary iodine (Moran’s I = 0.0405, P = 0.2890) and frequency> 300μg / L (Moran’s I = 0.0795, P = 0.0952) (Moran’s I = 0.2014, P = 0.0003), (100-200) μg / L (Moran’s I = 0.1166, P = 0.0257) and (200-300) μg / = 0.0066) There is a positive spatial correlation in the distribution of the scales. Local spatial autocorrelation analysis showed that there was a low-low correlation (Jiangbei) and a high-low correlation (Banan) in the median of urinary iodine in all districts and counties in Chongqing. There was a low-low correlation (> 300μg / L) There was a high-high correlation (Yuzhong, Jiangbei, Dadukou, Beibei) and high-low correlation (Wushan) in the proportion of <100μg / L; There was a high-low correlation (Tongliang, Shapingba, Jiulongpo, Jiangjin, Jiangbei, and Bishan), high-low correlation High correlation (Wushan), low - low correlation (Jiangjin, Jiangbei, Dadukou, Bishan), high - low correlation (Qianjiang, Dazu). Conclusion There is no spatial agglomeration of the total urinary iodine and> 300μg / L in the whole area of Chongqing. The concentration of urinary iodine is less than 100μg / L, (100-200 μg / L) and (200-300 μg / L) Urine iodine and different state proportions exist in different districts and counties.