这里的if是什么意思???

Question

What we found was that the mortality of patients in Michigan went down by 10 percent more than if they were in the 11 surrounding states

Answer 1

conj. 是否，如果，即使，每当
Do you know if he's married?
他结婚没结婚，你知道吗？

I can give you a round neckline if you prefer.
如果您喜欢我可以给您开个圆领口。

If he wins and it's a big if he'll be the first Englishman to win for twenty years.
假使他赢了－－是否能赢还是一大疑问－－他将是二十年来第一个获胜的英国人。

She glares at me if I go near her desk.
我一走近她的办公桌，她就瞪我。

n. 条件，设想

Answer 2

这各句子是一个假设的句子 。
What we found was that
我们发现的事实是这样的
the mortality of patients in Michigan went down by 10 percent more than if they were in the 11 surrounding states
密歇根州的病人假如是处在其周围的其他十一个州的话，死亡率会多降下降百份之十。

Answer 3

即使

Answer 4

的