I just posted on your other post too - it's pretty long so please read it too for a lot of details.
But I agree with Melissa's statement YES anything is possible.
And like I said in my other post, all disclaimers aside (I'm sure you've already been informed) I think it is very possible to draw some conclusions to the evidence out there about having a class 4 mutation, with pancreatic sufficiency will help you child to remain healthier, longer, than others with more "classic" presentation of CF.
At the time of diagnosis, our doctor informed us that we would not find a lot of long term information about the health of patience with this gene because they tend to be more on the mild side, most have been misdiagnosed and/or undiagnosed for years and their clinical information is not as well represented.
Knowing what her genes are is beneficial. There are many people who will disagree with me for various reasons and I know that each of us are correct to a certain degree in our arguments, but I think that yes, you can draw some crude or basic conclusions from the information available about what gene mutations "might" or are "likely" to cause or not cause. I think most all doctors will tell you that the R117H gene is one of the better genes to have since it is associated with pancreatic sufficiency and more mild lung involvement.
Is that a guarantee of anything? No.
Can anyone tell you for sure how your daughters disease will progress? No again.
<i>Can you draw some basic conclusions as to what is more likely to happen?</i> Can you hope for the best possible outcome? Yes, I believe so.
Educate yourself, provide the best environment for her you can (smoke free home etc), go to clinic appointments every three months, do the preventative treatments, keep her physically active (sports, musical instruments - things that work the lungs) and hope for the best !