Möllerberg Marie-Louise, Årestedt Kristofer, Hagell Peter, Melin Jeanette
Department of Care Science, Malmö University, Faculty of Health and Society, Malmö, Sweden.
RISE Research Institutes of Sweden, Division Safety and Transport, Measurement Science and Technology, Göteborg, Sweden.
BMC Palliat Care. 2025 Jan 9;24(1):8. doi: 10.1186/s12904-024-01639-5.
Family sense of coherence (FSOC) seems to reduce distress in the family and promote the well-being of the family. Therefore, getting accurate measurements for families with long-term illnesses is of particular interest. This study explores dyadic data analysis from the dyadic- and single-informant perspectives, and the measurement properties of the FSOC-S12 according to the Rasch model.
Racked and stacked data from 151 dyads were analyzed according to the polytomous Rasch model.
Notably, both the dyadic- and single-informant perspectives (i.e., racked and stacked data set-ups) showed measurement properties with minor deviations from the Rasch model according to fit statistics. However, most items had disordered thresholds and some problems with local dependency. Item hierarchies were similar in both set-ups and there was no differential item functioning (DIF) by role from the dyadic informant perspective. Four items showed DIF by informant role in the single-informant perspective.
Our approach to handling dyadic data has shown both strengths and limitations in the evaluation of FSOC-S12, and the understanding of FSOC as a construct from the family's view of the family's ability as a whole (dyadic-informant perspective) and patient's and family member's separate views of the family's ability as a whole (single-informant perspective).
家庭连贯感（FSOC）似乎能减轻家庭中的痛苦并促进家庭幸福。因此，对患有长期疾病的家庭进行准确测量尤为重要。本研究从二元和单一信息提供者的角度探讨二元数据分析，以及根据拉施模型分析FSOC-S12的测量属性。
根据多分类拉施模型对151个二元组的整理和汇总数据进行分析。
值得注意的是，从二元和单一信息提供者的角度（即整理和汇总数据集设置）来看，根据拟合统计，测量属性与拉施模型存在轻微偏差。然而，大多数项目的阈值无序，存在一些局部依赖性问题。两种设置下的项目层次结构相似，从二元信息提供者的角度来看，不存在按角色的项目功能差异（DIF）。在单一信息提供者的角度，有四个项目显示出按信息提供者角色的DIF。
我们处理二元数据的方法在评估FSOC-S12时既有优势也有局限性，并且从家庭作为一个整体的能力的家庭视角（二元信息提供者角度）以及患者和家庭成员对家庭作为一个整体的能力的单独视角（单一信息提供者角度）来理解FSOC这一结构。
