Characteristics of lupus patients with more than one kidney biopsy during follow-up
| Lupus patients with at least 2 renal biopsies (n=45) | |
|---|---|
| Female, n (%) | 40 (88.9) |
| Age at first renal biopsy, median (IQR) years | 29.6 (17.1) |
| Fulfilment of ACR 1997 lupus criteria,10 n (%) | 37 (82.2) |
| Fulfilment of SLICC 2012 lupus criteria,11 n (%) | 45 (100) |
| ANA positive, n (%) | 42 (93.3) |
| Sm antibody positive, n (%) | 12 (26.7) |
| Anti-dsDNA antibodies positive, n (%)* | 29 (64.4) |
| Antiphospholipid antibodies positive, n (%) ** | 15 (33.3) |
| Time between first and second renal biopsy, median (IQR) years | 3.4 (4.4) |
| Follow-up, median (IQR) years | 8.7 (7.5) |
*and **: insufficient data from 4 and 3 patients, respectively.
ACR, American College of Rheumatology; ANA, antinuclear antibodies; anti-dsDNA antibodies, antidouble-stranded DNA antibody; SLICC, The Systemic Lupus International Collaborating Clinics; Sm, anti-Smith antibodies.