Potential Bias Due to the Definition of RCTs for Inclusive Criteria of Systematic Reviews Published in Chinese Journals_Chinese Journal of Evidence-Based Medicine

Authors：

ZHANG Zhigang ^1,2 ,  WANG Xiaohu ^1,2,3 , ZHANG Qiuning ³

1. Evidence Based Medicine Center of Lanzhou University, Lanzhou 730000, China;2. The First Clinical Medical College of Lanzhou University, Lanzhou 730000, China;3. Tumor Hospital of Gansu Province, Lanzhou 730050, China;

Corresponding author：

WANG Xiaohu, Email: xhwanggs@yahoo.com.cn

Keywords：

Bias; Systematic review; Meta-analysis; Inclusion criterion; Randomized controlled trial

DOI：

10.7507/1672-2531.20130135

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The formulation of inclusive criteria is very important for the quality of systematic reviews as well as the reliability of results. However, among the systematic reviews based on randomized controlled trials (RCTs) published in Chinese periodicals, there are differences existing in the definition of inclusive criteria of RCTs, which may lead to the incomplete or inequitable inclusion. In addition, the relatively lower quality of domestic RCTs may also cause the possibility of bias. In this study, sampling analysis is applied to assess the current situation of both the RCTs definition for inclusive criteria of domestic systematic reviews and the types of practically included RCTs, so as to figure out the existing problems.

Citation： ZHANG Zhigang,WANG Xiaohu,ZHANG Qiuning. Potential Bias Due to the Definition of RCTs for Inclusive Criteria of Systematic Reviews Published in Chinese Journals. Chinese Journal of Evidence-Based Medicine, 2013, 13(6): 764-767. doi: 10.7507/1672-2531.20130135 Copy

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1. 中国生物医学文献数据库. http://sinomed.imicams.ac.cn/index.jsp.
2. Higgins JPT, Green S (editors). Cochrane handbook for systematic reviews of interventions. Version 5.1.0 [updated March 2011]: The Cochrane Collaboration; 2011. Available from: www.cochrane-handbook.org.
3. Jadad AR, Moore A, Carroll D, et al. Assessing the quality of reports of randomized clinical trials:Is blinding necessary. Control Clin Trials, 1996, 17(1): 1-12.
4. Wang G, Mao B, Xiong ZY, et al. The quality of reporting of randomized controlled trials of traditional Chinese medicine: a survey of 13 randomly selected journals from mainland China. Clin Ther, 2007, 29(7): 1456-1467.
5. 何梅, 罗梦林, 陈路佳, 等. 黄芪注射液辅助治疗病毒性心肌炎的系统评价. 中国药房, 2010, 21(48): 4570-4575.
6. Wu T, Li Y, Bian Z, et al. Randomized trials published in some Chinese journals: how many are randomized? Trials, 2009, 10: 46.
7. Schulz KF, Altman DG, Moher D, for the CONSORT Group. CONSORT 2010 Statement: updated guidelines for reporting parallel group randomised trials. BMJ, 2010, 340: c332.

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Potential Bias Due to the Definition of RCTs for Inclusive Criteria of Systematic Reviews Published in Chinese Journals

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