Bolejko Anetta, Wann-Hansson Christine, Zackrisson Sophia, Brodersen John, Hagell Peter
Department of Health Sciences, Lund University, Lund, Sweden.
Scand J Caring Sci. 2013 Jun;27(2):475-86. doi: 10.1111/j.1471-6712.2012.01035.x. Epub 2012 Jul 15.
Experiencing a false-positive screening mammography can cause considerable psychosocial distress. The Consequences of Screening - Breast Cancer questionnaire (COS-BC parts 1 and 2), recently developed in Denmark, is the only condition-specific questionnaire for measuring short- and long-term psychosocial consequences of false-positive mammographic screening. Additional studies are needed to further test the COS-BC before use across cultures. Furthermore, studies have suggested that the consequences of false-positive screening results are partly common across cancer screening settings, although this hypothesis remains largely untested.
This study (i) assesses content validity of a Swedish version of the COS-BC, (ii) tests whether items expressing long-term consequences of false-positive lung cancer screening results are relevant in a breast cancer screening context and (iii) explores the usefulness of taking results from Rasch analyses of the source version as an aid in questionnaire translation and adaptation.
Following dual-panel translation, content validity was assessed through qualitative interviews with representatives of the target population and the content validity index (CVI). Item locations and Rasch model fit of the source questionnaires were considered in the translation and assessment process.
The COS-BC items were generally found relevant and provided coverage of the target construct. Content validity was supported also for nine of 10 lung cancer screening items. Scale CVI values were ≥0.81. Previous Rasch data were useful in facilitating translation and assessing item content validity. The resulting Swedish version of the COS-BC parts 1 and 2 consists of 34 and 23 items, respectively.
This study illustrates the value of methodological triangulation and use of data from previous Rasch analyses in questionnaire translation and adaptation. We found support for the hypothesis that consequences of false-positive screening are common across cancer screening settings. Psychometric properties of the Swedish COS-BC remain to be established.
乳腺钼靶筛查出现假阳性结果会导致相当大的心理社会困扰。丹麦最近开发的《筛查后果 - 乳腺癌问卷》（COS - BC第1部分和第2部分）是唯一一份针对特定疾病的问卷，用于测量乳腺钼靶筛查假阳性结果的短期和长期心理社会后果。在跨文化使用之前，需要进行更多研究以进一步测试COS - BC。此外，研究表明，假阳性筛查结果的后果在部分癌症筛查环境中具有一定共性，尽管这一假设在很大程度上仍未得到验证。
本研究（i）评估瑞典语版COS - BC的内容效度，（ii）测试表达肺癌筛查假阳性结果长期后果的条目在乳腺癌筛查背景下是否相关，以及（iii）探讨将源版本的拉施分析结果作为问卷翻译和改编辅助工具的实用性。
在双盲翻译之后，通过对目标人群代表进行定性访谈以及内容效度指数（CVI）来评估内容效度。在翻译和评估过程中考虑源问卷的条目位置和拉施模型拟合情况。
COS - BC条目总体上被认为相关，并涵盖了目标结构。10个肺癌筛查条目中的9个也得到了内容效度的支持。量表CVI值≥0.81。先前的拉施数据有助于促进翻译并评估条目内容效度。最终得到的瑞典语版COS - BC第1部分和第2部分分别由34个和23个条目组成。
本研究说明了方法三角测量以及在问卷翻译和改编中使用先前拉施分析数据的价值。我们发现假阳性筛查后果在癌症筛查环境中具有共性这一假设得到了支持。瑞典语版COS - BC的心理测量特性仍有待确定。
