495例IgA肾病患者肾脏累积生存率分析

目的分析IgA肾病患者的肾脏生存率及预后影响因素.方法对我院495例IgA肾病患者临床病理资料进行Kaplan-Meier生存分析、单因素分析和多因素Cox回归分析.结果495例IgA肾病患者肾活检后10和15年累积肾脏生存率分别为85.0%和70.9%;单因素分析发现以下因素影响患者肾脏存活率:肾活检时已经有肾功能受损,表现为血肌酐≥133 μmol/L(P＜0.001)、高血压(P＜0.05)、24 h蛋白尿≥3 g(P＜0.001)、病理V级(P＜0.001)、没有肉眼血尿病史(P＜0.05);多因素Cox回归分析发现独立预后因素为肾活检时出现高血压相对危险度(HR)=7.75,95%可信区间(CI)为1.02～2.19]和血肌酐水平(HR=1.49,95%CI为1.54～38.90).结论本研究结果与欧美及亚洲其他国家IgA肾病患者的病程转归结果大致相当;积极控制血压、减少蛋白尿、保护肾功能对患者肾脏的长期存活有益.

A cumulative renal survival analysis of 495 cases of IgA nephropathy

OBJECTIVE: To study the long-term outcome of idiopathic IgA nephropathy and analyze its clinical and histological prognostic factors. METHODS: We conducted a retrospective analysis of 495 cases of IgA nephropathy patients in our hospital from 1986 to 2002. Renal survival was analyzed by Kaplan-Meier method, univariate analysis and multivariate Cox regression analysis. RESULTS: The cumulative renal survival rate was 85% at 10 years and 70.9% at 15 years. Univariate analysis found the following parameters at the time of biopsy to be significantly correlated with poor renal survival: serum creatinine > or = 133 micromol/L (P < 0.001), hypertension (P < 0.05), 24-hour urine protein excretion > or = 3 g (P < 0.001), histological subclass V (P < 0.001), and without the history of gross hematuria (P < 0.05). The Cox regression analysis showed that only the presence of hypertension (HR=7.75, 95%CI 1.02 to approximately 2.19) and serum creatinine level (HR=1.49, 95%CI 1.54 to approximately 38.90) were independent prognostic indicators. CONCLUSIONS: The findings in Chinese IgA nephropathy patients are in agreement with the results of many other studies worldwide.