[QUADAS-C-A tool for assessing risk of bias regarding Quality Assessment of Diagnostic Accuracy Studies-Comparative].

This paper introduced the Quality Assessment of Diagnostic Accuracy Studies-Comparative (QUADAS-C), illustrated the comparison with the QUADAS-2, and using QUADAS-C together with QUADAS-2 to present QUADAS-C results through systematic reviews. Like the domain for QUADAS-2, QUADAS-C retained four domains, including patient selection, index test, reference standard, flow, and timing, and comprised additional questions for each QUADAS-2 part. Unlike the QUADAS-2 tool, the starting question of each domain for QUADAS-C was designed to summarize the risk of biased information captured by QUADAS-2. QUADAS-C only dealt with the risk of bias but did not include the part of concerns regarding applicability. The answers to signaling questions for each domain of QUADAS-C would lead to a 'low''high' or 'unclear' risk of biased judgment for the original study.本文介绍了诊断试验准确性比较研究的偏倚评估工具（QUADAS-C）的主要内容，阐述了QUADAS-C与QUADAS-2的联系与区别，同时介绍了如何将QUADAS-C与QUADAS-2结合使用及如何呈现评价结果。QUADAS-C在QUADAS-2的基础上，共扩展14个标志性问题，形成4个关键领域（病例选择、待评价试验、金标准、病例流程和待评价试验与金标准之间的时间间隔）。与QUADAS-2不同的是，QUADAS-C各领域第一个标志性问题的回答均需结合QUADAS-2的评价结果；此外，QUADAS-C仅评价原始研究的偏倚风险而不包含适用性评价。完成QUADAS-C评价最终得出原始研究每个领域偏倚风险为“低”“高”或“不清楚”的结果。.