There are a lot of contributing factors. Young males are at the highest risk, being many times more likely than females to experience one. Also, smoking vastly increases the chance. I was a young man, who led a sedentary lifestyle and smoked heavily. I haven't smoked for 11 years, and have an extremely active lifestyle.
This is why my question regarding the report from the respiratory specialists is pertinent - if, upon examination, they can categorically state that the chances of recurrence are the same as having never had it, would it be grounds for overturning the decision? If I am at a higher risk still then so be it, I'm just trying to manage my expectations.