Psychosocial Oncology and Clinical Practice Research Group, University of Leeds, Level 3, Bexley Wing, St James's Institute of Oncology, Leeds, LS9 7TF, UK.
Qual Life Res. 2013 Aug;22(6):1435-40. doi: 10.1007/s11136-012-0242-3. Epub 2012 Aug 1.
The Social Difficulties Inventory (SDI-21) assesses everyday problems experienced by cancer patients, including difficulties with self-care, work and relationships. Early development and psychometric evaluation studies have validated the SDI-21 for computer administration. However, several recent studies have administered the SDI-21 on paper. We sought to test the score equivalence of electronic and paper versions of the SDI-21.
A randomised two-arm crossover trial in a sample of cancer patients with varied diagnoses. Patients completed electronic (via the internet) and paper versions of the SDI-21, with half randomly assigned to complete the electronic version first (n = 51) and half the paper version first (n = 60). Patients were asked to complete both versions at home, within 2 weeks. Analyses were performed for the SDI-21 summary score and three subscales.
Score distributions and internal reliabilities for the paper and electronic versions were highly similar. There were no significant differences between mean summary or subscale scores for the two administration modes. All mean score differences (all <0.25 of a scale point) were well below the SDI-21's established minimally important differences, and all 95 % confidence intervals were narrow and included zero. Intraclass correlations between paper and electronic scores were uniformly high and significant (all ≥0.85) and above the standard acceptable level of reliability.
Paper and electronic versions of the SDI-21 can be considered equivalent and used interchangeably. This is important because, despite the growth of electronic formats, paper versions are currently still necessary to ensure inclusive use of the SDI-21 with representative samples.
社会困难量表（SDI-21）评估癌症患者在日常生活中遇到的问题，包括自我护理、工作和人际关系方面的困难。早期的开发和心理测量评估研究已经验证了 SDI-21 可用于计算机管理。然而，最近有几项研究在纸质版上进行了 SDI-21 的测试。我们旨在测试 SDI-21 的电子版和纸质版的得分等效性。
在一组具有不同诊断的癌症患者中进行了一项随机两臂交叉试验。患者在家中完成 SDI-21 的电子版（通过互联网）和纸质版，其中一半患者被随机分配先完成电子版（n = 51），另一半患者先完成纸质版（n = 60）。患者在两周内完成两个版本。对 SDI-21 的总分和三个分量表进行了分析。
纸质版和电子版的得分分布和内部信度高度相似。两种管理模式的总分和分量表得分均无显著差异。所有平均得分差异（均小于 0.25 个量表点）均远低于 SDI-21 规定的最小有意义差异，所有 95%置信区间均较窄且包含零。纸质版和电子版之间的组内相关系数均高度一致且显著（均≥0.85），超过了可靠的标准可接受水平。
SDI-21 的纸质版和电子版可以被认为是等效的，可以互换使用。这一点很重要，因为尽管电子格式不断发展，但为了确保 SDI-21 在具有代表性的样本中得到包容性使用，目前仍然需要纸质版。
