OK, this is just from the internet again (indeed it's from the same source as above) but it might help you to focus in on the answer you're seeking. (The capital letters are mine. I'd have preferred to use italics by AB only allows one lot of italics in a post. I'm definitely not trying to shout at you though!):
Quote 1 (from the 'Overview' page on the NHS website):
"Chronic kidney disease (CKD) is a long-term condition where the kidneys don't work as well as they should.
IT'S A COMMON CONDITION often associated with getting older"
Quote 2 (from the same page):
"CKD can get worse over time and eventually the kidneys may stop working altogether, but this is UNCOMMON.
MANY PEOPLE WITH CKD ARE ABLE TO LEAD LONG LIVES WITH THE CONDITION"
Quote 3 (from my original link):
"MANY PEOPLE with advanced-stage CKD develop anaemia, which is a lack of red blood cells"
i.e. as I read it, CKD is fairly common and developing anaemia as a result of CKD is quite common too. My own kidney function is less than perfect but I've not ordered the flowers for my funeral yet!
For further advice, I suggest getting in touch with Kidney Care UK. You might, for example, ask for an invitation to join their closed Facebook group, where you could then get in touch directly with others who've got CKD:
https://www.kidneycareuk.org/get-support/