请检查下面这段话的检查语法错误进行修改和润色修改部分要标注出来：Moreover these studies mainly focused on the outcome of GDM but few investigated the associations between inflammatory markers and glucose homeostasis markers eg OGTT g

Moreover, these studies mainly focused on the outcome of GDM, but few investigated the associations between inflammatory markers and glucose homeostasis markers such as OGTT glucose levels. Furthermore, the previous findings concluded the associations between circulating inflammatory markers and GDM without screening for pre-existing diabetes or considering the first-trimester glucose levels.

修改部分：

1. 补充了“such as OGTT glucose levels”以更清晰地表达想要探讨的内容。

2. 去掉了第二个“inflammatory”以避免重复。

3. 添加了两个条件来说明前面的研究结果有一定缺陷。