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BioMed Research International
Volume 2013 (2013), Article ID 868202, 7 pages
http://dx.doi.org/10.1155/2013/868202
Research Article

The Clinical Profile and Prognosis of Chinese Children with Melamine-Induced Kidney Disease: A Systematic Review and Meta-Analysis

1Institute of Reproductive and Child Health/Ministry of Health Key Laboratory of Reproductive Health, School of Public Health, Peking University, 38 College Road, Haidian District, Beijing 100191, China
2Department of Epidemiology and Biostatistics, School of Public Health, Peking University, 38 College Road, Haidian District, Beijing 100191, China
3Guangxi Administration of Work Safety, 10 Dongbao Road, Qingxiu District, Nanning 530022, China

Received 18 April 2013; Accepted 17 July 2013

Academic Editor: Sabine Rohrmann

Copyright © 2013 Pei-Xin Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Introduction. Studies have reported inconsistent results regarding clinical feature and the prognosis status of the affected children in China melamine-contamination event. We summarized available literatures by performing a review and meta-analysis. Methods. Statistical pooling was performed using random-effects model; the sources of heterogeneity were explored through subgroup analyses. Results. Twenty-six studies involving 2164 patients with kidney abnormalities were identified; 94.4% of the patients had urinary calculi and 95.8% of the calculi were <10 mm in diameter. Of 2040 patients with known types of treatment, 5.6% underwent surgical treatment. The pooled recovery rates at 1, 3, 6, and 12 months after diagnosis or treatment initiation were 67.1%, 76.3%, 85.4%, and 92.3%, respectively; these pooled rates did not differ between the study subgroups stratified by mean age at diagnosis, mean duration of melamine exposure, types of patients (inpatient/outpatient), and treatment types (specific/nonspecific), except that the 1-month recovery rate for studies involving a specific treatment (71.9%) was higher than that for studies involving non-specific treatment (46.2%). Conclusion. The majority of patients had small calculi and could recover without surgical treatment. Kidney abnormalities remained in about 8% of the patients at 12-month followup, indicating a need for longer-term followup.