Institute of Public Health, Department and Research Unit of General Practice, University of Copenhagen, Copenhagen, Denmark.
Value Health. 2010 Aug;13(5):601-12. doi: 10.1111/j.1524-4733.2010.00697.x. Epub 2010 Mar 12.
The objective of this study was to extend the Consequences of Screening (COS) Questionnaire for use in a lung cancer screening by testing for comprehension, content coverage, dimensionality, and reliability.
In interviews, the suitability, content coverage, and relevance of the COS were tested on participants in a lung cancer screening program. The results were thematically analyzed to identify the key consequences of abnormal and false-positive screening results. Item Response Theory and Classical Test Theory were used to analyze data. Dimensionality, objectivity, and reliability were established by item analysis, examining the fit between item responses and Rasch models.
Eight themes specifically relevant for participants in lung cancer screening results were identified: "self-blame,""focus on symptoms,""stigmatization,""introvert,""harm of smoking,""impulsivity,""empathy," and "regretful of still smoking." Altogether, 26 new items for part I and 16 new items for part II were generated. These themes were confirmed to fit a partial-credit Rasch model measuring different constructs including several of the new items.
In conclusion, the reliability and the dimensionality of a condition-specific measure with high content validity for persons having abnormal or false-positive lung cancer screening results have been demonstrated. This new questionnaire called Consequences of Screening in Lung Cancer (COS-LC) covers in two parts the psychosocial experience in lung cancer screening. Part I: "anxiety,""behavior,""dejection,""sleep,""self-blame,""focus on airway symptoms,""stigmatization,""introvert," and "harm of smoking." Part II: "calm/relax,""social network,""existential values,""impulsivity,""empathy," and "regretful of still smoking."
本研究旨在通过测试理解、内容涵盖、维度和可靠性，将《筛查后果问卷》（COS）扩展应用于肺癌筛查。
在对肺癌筛查计划的参与者进行访谈时，测试了 COS 的适用性、内容涵盖和相关性。结果通过主题分析进行了分析，以确定异常和假阳性筛查结果的关键后果。使用项目反应理论和经典测试理论来分析数据。通过项目分析确定了维度、客观性和可靠性，检验了项目反应与 Rasch 模型之间的拟合程度。
确定了与肺癌筛查结果参与者特别相关的 8 个主题：“自责”、“关注症状”、“污名化”、“内向”、“吸烟危害”、“冲动”、“同理心”和“后悔仍在吸烟”。总共为第一部分生成了 26 个新条目，为第二部分生成了 16 个新条目。这些主题被证实符合一个部分信用 Rasch 模型，该模型测量了不同的构建，包括几个新条目。
总之，已经证明了一种具有高内容有效性的特定于条件的测量方法的可靠性和维度，用于测量异常或假阳性肺癌筛查结果的个体。这种新的问卷称为《肺癌筛查后果问卷》（COS-LC），分两部分涵盖了肺癌筛查中的心理社会体验。第一部分：“焦虑”、“行为”、“沮丧”、“睡眠”、“自责”、“关注气道症状”、“污名化”、“内向”和“吸烟危害”。第二部分：“平静/放松”、“社交网络”、“存在价值”、“冲动”、“同理心”和“后悔仍在吸烟”。
