Abstract

Objectives

To extract the items most suitable for a short version of the 15-item Geriatric Depression Scale (GDS-15) in a sample of adults aged ≥ 85 years using item response theory (IRT).

Method

This population-based cross-sectional study included 651 individuals aged ≥ 85 years from the Umeå 85+/GErontological Regional DAtabase (GERDA) study. Participants were either community dwelling (approximately 70%) or resided in institutional care (approximately 30%) in northern Sweden and western Finland in 2000–2002 and 2005–2007. The psychometric properties of GDS-15 items were investigated using an IRT-based approach to find items most closely corresponding to the GDS-15 cut off value of ≥5 points. Receiver operating characteristic curves were used to compare the performance of the proposed short version with that of previously proposed short GDS versions.

Results

GDS-15 items 3, 8, 12, and 13 best differentiated respondents’ levels of depressive symptoms corresponding to the GDS-15 cut off value of ≥5, regardless of age or sex, and thus comprise the proposed short version of the scale (GDS-4 GERDA). For the identification of individuals with depression (total GDS-15 score ≥ 5), the GDS-4 GERDA with a cut-off score of ≥2 had 92.9% sensitivity and 85.0% specificity.

Conclusion

The GDS-4 GERDA could be used as an optimized short version of the GDS-15 to screen for depression among adults aged ≥ 85 years.

中文翻译：

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使用项目反应理论在 85 岁及以上的成年人样本中提取的 15 项老年抑郁量表的临床上可行的简短版本

摘要

目标

使用项目反应理论 (IRT) 在 85 岁以上的成年人样本中提取最适合 15 项老年抑郁量表 (GDS-15) 的简短版本的项目。

方法

这项基于人群的横断面研究包括来自于默奥 85+/GErontological 区域数据库 (GERDA) 研究的 651 名年龄 ≥ 85 岁的个体。参与者在 2000-2002 年和 2005-2007 年期间在瑞典北部和芬兰西部居住在社区住宅（约 70%）或居住在机构护理中（约 30%）。使用基于 IRT 的方法研究 GDS-15 项目的心理测量特性，以找到与 GDS-15 截止值≥5 分最接近的项目。接收者操作特征曲线用于比较建议的短版本与先前建议的短 GDS 版本的性能。

结果

GDS-15 项目 3、8、12 和 13 最能区分受访者的抑郁症状水平，对应于 GDS-15 截止值 ≥5，无论年龄或性别如何，因此构成了建议的短版量表（ GDS-4 格尔达）。对于抑郁症个体的识别（总 GDS-15 评分 ≥ 5），GDS-4 GERDA 的分界值≥2 具有 92.9% 的敏感性和 85.0% 的特异性。

结论

GDS-4 GERDA 可用作 GDS-15 的优化短版，用于筛查 85 岁以上成年人的抑郁症。