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Retrospective analysis of nephritis response and renal outcome in a cohort of 928 Egyptian lupus nephritis patients: a university hospital experience.

Lupus 2017 December
Aim We aim to describe the pattern of response to treatment in a cohort of Egyptian lupus nephritis (LN) patients and to define variable prognostic factors. Methods We retrospectively analyzed records of 928 systemic lupus erythematosus (SLE) patients (898 females, 30 males) with biopsy-confirmed LN seen between 2006 and 2012 at Cairo University hospitals. Results Our study involved 928 SLE patients with a mean age of 26.25 ± 6.487 years, mean LN duration at time of renal biopsy 6.48 ± 4.27 months, mean SLEDAI 28.22 ± 11.7, and mean follow-up duration of 44.14 ± 17.34 months. Induction treatment achieved remission in 683 patients. Remission was achieved in all 32 patients with class II LN, compared to 651/896 (72.7%) patients in classes III, IV, and V. Induction by intravenous (IV) cyclophosphamide achieved response in 435/575 (75.7%) patients, while induction by mycophenolate mofetil (MMF) resulted in response in 216/321 (67.3%) patients ( p = 0.0068). Nephritic flares were least observed when MMF was used for maintenance (30/239 (12.6%) patients), compared to 71/365 patients (19.5%) ( p = 0.0266) when azathioprine (AZA) was used, and 22/79 patients (27.8%) ( p = 0.002) with IV cyclophosphamide. Class IV LN, high chronicity index, presence of crescents, and interstitial fibrosis in biopsies were all associated with chronic kidney disease (CKD) development eventually ( p < 0.001, p = 0.005, p = 0.012, and p = 0.031, respectively). By the end of the study duration, 305 (32.7%) patients had CKD. Logistic regression detected that high baseline serum creatinine, failure to achieve remission, hypertension, and nephritic flare were the main risk factors for poor renal outcome ( p < 0.001, p < 0.001, p = 0.004, and p < 0.001, respectively). The 5 years' mortality was 69 (7.4%) patients with sepsis being the main cause of death. Conclusion IV cyclophosphamide superseded as induction treatment, while MMF was the best maintenance treatment. High serum creatinine, hypertension, and nephritic flare were the main risk factors for poor renal outcome.

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