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  • Title: Long-term results of a randomized controlled trial in childhood IgA nephropathy.
    Author: Kamei K, Nakanishi K, Ito S, Saito M, Sako M, Ishikura K, Hataya H, Honda M, Iijima K, Yoshikawa N, Japanese Pediatric IgA Nephropathy Treatment Study Group.
    Journal: Clin J Am Soc Nephrol; 2011 Jun; 6(6):1301-7. PubMed ID: 21493743.
    Abstract:
    BACKGROUND AND OBJECTIVES: Children with IgA nephropathy showing diffuse (>80%) mesangial proliferation are at high risk for end-stage renal failure (ESRF). A previous controlled trial showed that combination therapy consisting of prednisolone, azathioprine, heparin-warfarin, and dipyridamole early in the course of disease reduces immunologic renal injury and prevents the progression of sclerosed glomeruli. The objective of this study was to evaluate the long-term effectiveness of combination therapy in children with IgA nephropathy showing diffuse mesangial proliferation. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: A secondary analysis of a multicenter, randomized, controlled trial involving 78 children with IgA nephropathy who received either 2-year combination therapy or heparin-warfarin and dipyridamole (control) therapy was conducted. RESULTS: The median duration of observation was 10 years (range, 0.5 to 18). Two of 40 patients (5%) who received combination therapy and five of 34 patients (14.7%) who received control therapy developed ESRF. A Kaplan-Meier plot of renal survival showed that the outcomes of patients in the combined therapy group were better than those in the control therapy group (log-rank P = 0.03). The 10-year renal survival probability of each group was 97.1% (95% confidence interval, 81.4 to 99.6%) and 84.8% (95% confidence interval, 55.4 to 95.5%), respectively. The Cox proportional hazards model showed that the 2-year combination therapy was significantly associated with renal survival in both univariate and multivariate analyses. CONCLUSIONS: Two-year combination therapy not only ameliorated the activity of the acute phase of nephritis but also improved the long-term outcome of severe childhood IgA nephropathy.
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