I am pretty sure the logistic model can help you identify the most influential variable. (if there is one).
You may use p-value to do this.

Since the answer to your first question is positive, the second question is unnecessary.

I hope this help.
Good luck buddy. :)

你可以看一下模型的回归系数的检验p值，p值越小，说明这个变量越重要。

谢谢各位的热心帮助，我大概知道怎么比较了~

是看P值吗？？

是的，看P值