目的 通过回顾与分析2010年至2013年参加江苏省免疫定量项目室间质评结果，分析影响定量免疫项目检验质量的因素，进一步提高实验室免疫检验水平。方法 将2010年至2013临床免疫定量项目室间质评结果进行统计，采用能力验证（PT）方法进行评分，同时结合偏倚和SDI等指标进行分析。结果 4年室间质评肿瘤标志物平均PT得分为95分，内分泌项目为99分，3个项目出现过不合格的情况，所有项目平均偏倚的绝对值在4%～11%，平均SDI绝对值在0.3～1.1。结论 室间质评工作可对检验结果进行持续性的监测，可促进各临床实验室严控质量管理，从而提高检验工作的质量。

Objective To analysis the influence factors on the quantitative immunoassays by review and summary of external quality assessment (EQA) results in Jiangsu Province. Methods EQA results were scored by using proficiency testing (PT) method, and analysised with other indicators such as Bias and Standard Deviation Index (SDI). Results The results showed that the average PT score of tumor markers assays was 95 points, the score of endocrine assays was 99 points, it had appeared unqualified cases in three assays. The absolute value of average bias of all the assays was 4%-11%, the absolute value of average SDI was 0.3～1.1 points. Conclusion EQA can be continuous monitoring clinical quantitative immunoassays, and can improve the quality of clinical immunoassays.