BACKGROUND: To date, there has been much controversy about the role of crescentic lesion as a significant prognostic factor in immunoglobulin A nephropathy (IgAN). This study evaluated whether crescentic lesions predict adverse renal outcomes in IgAN patients. METHODS: A total of 430 patients with biopsy-proven IgAN between January 2000 and December 2009 were included. Histological variables of the Oxford classification (Oxford-MEST) and the presence of crescents were assessed. The primary endpoint was a 50% decline in estimated glomerular filtration rate. RESULTS: Of the 430 patients, 81 (18.8%) had a crescentic lesion. During a mean follow-up of 61 months, the primary outcome occurred in 19 (23.5%) patients with crescents compared with 40 (11.5%) patients without crescents (P=0.01). A Kaplan-Meier plot showed that the 10-year renal survival rate was significantly lower in patients with crescents than patients without crescents (P=0.01). However, in a multivariable Cox analysis which included clinical factors and the Oxford-MEST, crescents were not significantly associated with an increased risk of developing the primary outcome [hazard ratio: 0.71, 95% confidence interval (CI) 0.36-1.41, P=0.33]. Furthermore, adding crescents to the Oxford-MEST did not improve the discriminative ability for the prediction of renal outcomes [c-statistic: 0.86 (0.81-0.91) vs. 0.86 (0.80-0.91), P=0.21]. CONCLUSION: Crescentic lesion was not an independent prognostic factor, suggesting that crescents have limited value in predicting renal outcomes of IgAN.
BACKGROUND: To date, there has been much controversy about the role of crescentic lesion as a significant prognostic factor in immunoglobulin A nephropathy (IgAN). This study evaluated whether crescentic lesions predict adverse renal outcomes in IgANpatients. METHODS: A total of 430 patients with biopsy-proven IgAN between January 2000 and December 2009 were included. Histological variables of the Oxford classification (Oxford-MEST) and the presence of crescents were assessed. The primary endpoint was a 50% decline in estimated glomerular filtration rate. RESULTS: Of the 430 patients, 81 (18.8%) had a crescentic lesion. During a mean follow-up of 61 months, the primary outcome occurred in 19 (23.5%) patients with crescents compared with 40 (11.5%) patients without crescents (P=0.01). A Kaplan-Meier plot showed that the 10-year renal survival rate was significantly lower in patients with crescents than patients without crescents (P=0.01). However, in a multivariable Cox analysis which included clinical factors and the Oxford-MEST, crescents were not significantly associated with an increased risk of developing the primary outcome [hazard ratio: 0.71, 95% confidence interval (CI) 0.36-1.41, P=0.33]. Furthermore, adding crescents to the Oxford-MEST did not improve the discriminative ability for the prediction of renal outcomes [c-statistic: 0.86 (0.81-0.91) vs. 0.86 (0.80-0.91), P=0.21]. CONCLUSION: Crescentic lesion was not an independent prognostic factor, suggesting that crescents have limited value in predicting renal outcomes of IgAN.
Entities:
Keywords:
Oxford classification; crescents; immunoglobulin a nephropathy; outcome
Authors: Rupali S Avasare; Paul E Rosenstiel; Ziad S Zaky; Demetra S Tsapepas; Gerald B Appel; Glen S Markowitz; Andrew S Bomback; Pietro A Canetta Journal: Am J Nephrol Date: 2017-01-06 Impact factor: 3.754
Authors: Mark Haas; Jacobien C Verhave; Zhi-Hong Liu; Charles E Alpers; Jonathan Barratt; Jan U Becker; Daniel Cattran; H Terence Cook; Rosanna Coppo; John Feehally; Antonello Pani; Agnieszka Perkowska-Ptasinska; Ian S D Roberts; Maria Fernanda Soares; Hernan Trimarchi; Suxia Wang; Yukio Yuzawa; Hong Zhang; Stéphan Troyanov; Ritsuko Katafuchi Journal: J Am Soc Nephrol Date: 2016-09-09 Impact factor: 10.121