Violet M wrote:
Do you know what percent of people who smoke get lung cancer? It's less than 50%. Yet it is an accepted fact that smoking causes lung cancer. You don't have to have 100% of people develop SI problems after severing the ligament to support the hypothesis that severing the ligament may lead to pelvic instability in some people.
Yes but direct causation between smoking and cancer has been proven. Whereas the argument that the severing of the ligaments causes pelvic instability even in some people is still speculative.
Also with smoking the risk of cancer is not immediate. You don't smoke a cigarette and instantly start to get cancer, it can take years and years to develop and within that time people can die of other things. If a smoker lived till a 100 we might find the incidence of cancer was higher.
Whereas with the sacro tuberous ligament if it really is critical to function as has been claimed in this thread (not by yourself) patients should start to notice a change extremely soon after the operation. However the majority of people it would seem are not. Houston and France combined must have operated on well over a thousand people by now. I think if this operation led to a 50% incidence of pelvic instability forums such as this would be flooded with warnings. We could go by the small example on tipna but it is not a serious study and there is a problem with the sample as most people that recover will not check back into a forum. Even if we do go by that there is still a large percentage of people who do not get instability and no causation can be shown from it. There could be other factors at play here. As the science mantra goes -
correlation does not imply causation.
For instance the Houston team have claimed that once they screened for pelvic instability issues before surgery no one has reported instability issues. Even before that only 2 patients apparently reported instability. I guess the counter to that is the Houston team are lying.
So I think we still have to say that even the argument that severing the ligaments leads to pelvic instability in some people is still speculative. Pointing to a 50% incidence from a very small sample on tipna is not enough. Even the scientists that found lots of people were developing cancer accepted that pointing to a correlation would not be enough. The cigarette companies turned around and said prove it.
That's like asking someone who has a hysterectomy who wakes up with permanent PN pain to prove that the surgery caused her PN. She can't prove it, but to her it is very obvious.
I accept that with the above example your right and often the simplest explanation can often be the right one , occams razor as I have seen it referred to on CSI, but there is still the annoying burden of proof to deal with and it cannot be ignored.
I have said repeatedly that I am no expert. Your better and made a good choice with your surgery and I respect that. I have also said a few times now that there have been some great arguments put forward and I am grateful. I share your concerns about the ligaments. However even after reading these arguments I think it is still speculation, not proof. As I have said Houston , Nantes and now the UK government must agree with that. I guess I am just incredulous at the possibility that these surgeons are performing such an irresponsible procedure.
I think we can say that there is a valid cause for concern that the severing of the ligaments creates instability but I don't think we can say that severing the ligaments creates pelvic instability in some people.
I want to stress that I really don't want to be seen as the person that is saying it is okay to sever the ligaments. In this thread I am playing devils advocate. I know you all know what devils advocate means but I did find the definition on wikipedia to be a perfect summary of what I am trying to do.
The purpose of such process is typically to test the quality of the original argument and identify weaknesses in its structure, and to use such information to either improve or abandon the original, opposing position.
The reason I am doing this is that I want to make the right decision for myself. I realize I am probably not exactly making new friends on this thread! However I just want to recover and find out as much as I can. I am genuinely worried about the ligaments as I realize that once they are gone, they are gone for good.
I don't know what to believe anymore with this condition as I have heard so many different theories on it over the years. I do often wonder why I not only had to get ill but also why I got such a controversial condition.