No one has mentioned this yet, so I will. Though you really have to find out what the lab your vet used has for range of low - normal - high, the HCT and HGB (hematocrit and hemaglobin) seem low to me. Per the lab my vets use, this would be low.
Here is a link that if you scroll towards the bottom, it lists the normal values for cats and dogs on these two and other parts of a complete blood count (cbc):http://www.peteducation.com/article....&articleid=987
It is not unusual for cats with kidney function issues to also develop anemia...you can read more about that in the sticky thread on crf and the links to sites given there.
I would also be sure to find out if this potasium result (the K+) is considered low by this lab - many kitties with crf end up needing a potassium supplement added to their diet...this number seems a bit low to me or approaching too low.
for your kittie,