CD4 and chronic kidney disease: They found that the relative risks of CKD for HIV-infected people with CD4 count less than or equal to 200 cells/mm3, between 201-349 cells/mm3 and between 350-499 cells/mm3 were 6.8 (3.0-15.5), 4.3 (2.3-8.1) and 2.4 (1.3-4.6) compared with people with a CD4 count greater than or equal to 500 cells/mm3, respectively.