Mortality and risk factors of scleroderma renal crisis: a French retrospective study in 50 patients
- Luis Teixeira ( )
- Luc Mouthon ( )
- Published Online First 8 June 2007
Objectives: To describe presentation and outcome of patients with scleroderma renal crisis (SRC).
Methods: SRC was defined as rapidly progressive oliguric renal insufficiency and/or rapidly progressive arterial hypertension occurring during the course of systemic sclerosis (SSc). Chronic dialysis-free survival was analyzed using multivariate Cox proportional hazards regression models. The risk for developing SRC associated with corticosteroid (CS) exposure during the preceding 3- or 1-month periods was analyzed according to a case-crossover design.
Results: Fifty SSc patients aged of 53.3±14.5 (mean±SD) yr were included. SRC occurred between 1979 and 2003, after a mean disease duration of 27.7±49.1 mo. Forty three (86%) patients had diffuse SSc, 5(10%) had limited cutaneous SSc and 2(4%) had SSc sine sleroderma. At the time of SRC, ten (20%) patients were on with angiotensin converting enzyme inhibitors, and mean creatininemia was 468±293 µmol/l. Twenty eight (56%) patients required hemodialysis. Eleven patients underwent a renal biopsy, all of them had specific vascular lesions of SRC. Multivariate analyses retained age >53 years and normal blood pressure as independent predictors of decreased dialysis-free survival. Exposure to CS prior to SRC was identified in 30 (60%) patients. The odds ratios for developing SRC associated with CS exposure during the preceding 3- or 1-month periods were 24.1 (95% CI: 3.0–193.8) and 17.4 (95% CI: 2.1–144.0), respectively.
Conclusion: SRC remains associated with severe morbidity and mortality. CS might increase the risk of developing SRC. Further studies are needed to confirm these results.