Fig. 2

Change in eGFR and relapse-free survival curves for PEX vs. no PEX patients. a change in abbreviated 4-variable MDRD estimated glomerular filtration rate (eGFR) over the 12 months since starting treatment. Data are shown as mean ± standard deviation. Blue circles: received no plasma exchange (PEX); red squares: received PEX. At each time point eGFR was different between the two groups (p < 0.05) based on a repeated measures ANOVA. Between 0 and 12 months there was no change in eGFR in the no PEX group whereas eGFR improved in the PEX group (p < 0.001). b relapse-free survival curves for patients in the group receiving plasma exchange (PEX, red line, n = 58) up to 6 years and for those not receiving it (blue line, n = 46) up to 10 years. p = 0.64 by log rank analysis