Below is an instruction from Human. Write a response.
    ### Instruction:
    How many people are affected by Acquired Cystic Kidney Disease ?
    ### Response:
    Acquired cystic kidney disease becomes more common the longer a person has CKD.
                
- About 7 to 22 percent of people with CKD already have acquired cystic kidney disease before starting dialysis treatments.  - Almost 60 percent of people on dialysis for 2 to 4 years develop acquired cystic kidney disease.
    