If by "related", you mean this:

A recent study in California of the extra economic costs
associated with cerebral palsy and 17 other birth defects, such as
Down syndrome and spina bifida, showed that cerebral palsy had
the highest lifetime costs per new case ($503,000 in 1992
dollars). Half of these costs are borne by families, who often find
it difficult to obtain all the services they need to help their
children.

then C.P. And S.B. are related, But onl;y because they come under the
broader category of developmental disabilities, or "birth defecta," not
because they have the same effects...

Mike

Beth Anderson wrote:
>
> Hi Mike,
>
> I would hope you are right - but I have found several different times on
> internet that the two are "related" here is one article:
>
> http://www.cdc.gov/nceh/programs/cddh/dd/ddcp.htm
>
> Thanks,
> Beth