Hughes Jonathan H, Bentz Joel S, Fatheree Lisa, Souers Rhona J, Wilbur David C
Laboratory Medicine Consultants Ltd., 3059 S Maryland Parkway, Las Vegas, NV 89109, USA.
Arch Pathol Lab Med. 2009 Feb;133(2):279-82. doi: 10.5858/133.2.279.
Because the consequences of making an interpretive error on a proficiency test are more severe than those made on an educational challenge, the same slide may exhibit different performance characteristics in the 2 different settings.
The results of the 2006 College of American Pathologists Gynecologic Cytology Proficiency Testing Program (PAP PT) provide the opportunity to compare the performance characteristics of the field-validated slides in the PAP PT environment with those of the same graded slides in the College of American Pathologists Educational Program (formerly known as the PAP Program).
All participant responses for negative (category B) and positive (categories C and D) validated slides in the 2006 PAP PT were used to determine the error rates of participants. These data were compared with the historical error rates observed on the same validated slides in the graded PAP Program.
The performance characteristics of the slides in the PAP PT environment were statistically different from those in the Educational PAP Program. In proficiency testing both cytotechnologists (P < .001) and pathologists (P = .002) were more likely to interpret validated category B slides as category C or D and less likely to interpret category C slides as category B (P < .001). These differences were more pronounced among cytotechnologists than among pathologists.
In the test-taking environment, both cytotechnologists and pathologists appear to use a defensive strategy that results in "upgrading" of category B slides. This trend is more pronounced among cytotechnologists.
由于在能力验证测试中出现解释错误的后果比在教育挑战中更为严重,因此同一张玻片在两种不同环境下可能表现出不同的性能特征。
2006年美国病理学家学会妇科细胞学能力验证测试项目(PAP PT)的结果提供了一个机会,可将PAP PT环境中经过现场验证的玻片的性能特征与美国病理学家学会教育项目(原称为PAP项目)中相同分级玻片的性能特征进行比较。
2006年PAP PT中所有参与者对阴性(B类)和阳性(C类和D类)验证玻片的反应用于确定参与者的错误率。这些数据与在分级PAP项目中相同验证玻片上观察到的历史错误率进行比较。
PAP PT环境中玻片的性能特征与教育性PAP项目中的性能特征在统计学上存在差异。在能力验证测试中,细胞技术人员(P <.001)和病理学家(P =.002)都更有可能将已验证的B类玻片解释为C类或D类,而将C类玻片解释为B类的可能性较小(P <.001)。这些差异在细胞技术人员中比在病理学家中更为明显。
在应试环境中,细胞技术人员和病理学家似乎都采用了一种防御性策略,导致B类玻片被“升级”。这种趋势在细胞技术人员中更为明显。