新疆地理环境与地方性甲状腺肿关系剖析

用防治干预前全疆病区收集的资料分析地方性甲状腺肿与地理环境关系．从中生代到第三纪中期，塔里木西南部发生多次海侵海退．晚第三纪喜马拉雅运动导致昆仑山脉、天山山脉和阿尔泰山上升形成三山夹两盆地的地貌．居民甲状腺肿患病率自北向南而加重，各区降水量与病情关系不明显．河流中段病情随着河流径流量增加而上升．近河床区患病率高于远离河床者．盆地倾斜平原患病率由上向下逐渐减轻．第三纪海侵区患病率远高于其它地区．海侵区远端和中段的患病率高于近端区．新疆地方性甲状腺肿分布与地理因素有明显关系．

Analyses of relationship between geography and endemic goiter in Xinjiang

In order to understand the relationship between endemic goiter and geographical environment, the relationship between endemic goiter and geographical environment was analyzed with a group of data collected from whole endemic areas before preventing intervention in Xinjiang. During the period of Palaeozoic era, most areas of Xinjiang were ancient-sea. The ancient sea in north part of Xinjiang disappeared in the late Palaeozoic era, then two seas, South Tianshan-sea and Tuha sea, shrank to the west and east respectively and disappeared during the end of this period. During the period from Cretaceous period to middle of Tertiary period, many times marine transgressions and regressions were occurred in south-west margin of Tarim. During Neogene, the Himalayan movement let to rise of the area, and the ancient sea withered away finally. Endemic goiter among inhabitants increased as the ancient sea disappeared time from north to south in Xinjiang. No obvious correlation was found between goiter incidence and annual mean precipitation. Endemic goiter increased with the discharge at the middle reaches of the river, and the incidence among the people living in place near bed of river was higher than that observed far away from the river. On the inclined plain of the basin, the incidence of endemic goiter decreased gradually from upper part to lower place. In the area where had been transgressed by ancient sea, the goiter incidence was much higher than that in other places. Goiter incidence of people who living in the middle and remote sections of ancient marine transgression also higher than that in the initial section. The results showed that distribution of endemic goiter has a close relation with the geography factors in Xinjiang.