CD19 and chronic kidney disease: IMT was increased in total CD19(+) B cells ≤0.06 × 109 /L in the total cohort (1.06 ± 0.18 vs. 0.97 ± 0.16, P = 0.004) and CKD group (1.11 ± 0.18 vs. 0.99 ± 0.16, P = 0.003).