yes agree...
i feel that autonomic issues can effect ic...it hasnt in my case caused anything more than the lack of being able to get to the bathroom more of a challenge...which does effect my ability to make the toilet, but isn't directly effecting my underlying ic issues.
i feel that sensory issues can effect ic...and has in my case...not able to feel when you need the bathroom causes major issues.
i dont see autism itself effecting ic...but the other issues that usually surround autism do and can...but in and of itself i dont feel autism is a major component of ic...
Seems to me that nerve damage is the leading cause, and as a result the lesser forms of the general nerve damage, sensory issues, to a lesser degree can effect ic...
There is NO one cause of anything in this life, and i can only state my take personally and what i've ive read/learned over the last 4 decades of this issue.
Bottom line my take is:
The biggest issues will be focused around nerve issues, and the more severe the issue and how direct it is associated with the nerves in that area will be more common and cause more issues.
Someone could become IC from pet dander, but it would be a rather miniscule percentage.
Now I have spinal damage from infection as a kid, and have from that been never dry at night, daytime is a challenge...later in life have had some other issues that may make it a bit worse, but nothing to the degree of the original issue.
sure with being in a wheelchair makes it harder to make the bathroom easily and quickly and causes the already dire need to become near impossible when out of the house.
So as i said, my 2 cents (with inflation that's not worth much).