Construct validity of the SF-12 in three different samples
Construct validity of the SF-12 in three different samples
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DOI：
10.1111/j.1365-2753.2010.01623.x
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发表时间：
2012-06-01
影响因子：
2.4
通讯作者：
Hagell, Peter
中科院分区：
文献类型：
--
作者：
Jakobsson, Ulf;Westergren, Albert;Hagell, Peter
理由、目的和目标研究对36项简表健康调查的身体和精神部分总分的有效性和基本测量模型提出了质疑，例如老年人和神经系统疾病患者。然而，目前尚不清楚这些观察结果在多大程度上转化为来自36项简明健康调查表的12项简明健康调查表（SF-12）的身体和精神成分总分。本研究评估了SF-12在老年人和帕金森病（PD）和脑卒中患者中的结构效度。方法对4278例老年人（75岁以上）、159例PD患者和89例脑卒中幸存者的SF-12数据进行数据质量、信度（系数α）和内部结构效度分析。后者通过项目总相关、探索性和验证性因素分析进行评估。结果数据完整性高（9398.8%），信度可接受（0.78 ± 0.85）。项目总的相关性反对建议的项目，以总结分数结构，在所有三个样本。探索性因素分析未能支持老年人和中风幸存者的二维项目结构，在所有三个样本中均观察到项目的交叉负荷。实证因素分析表明，缺乏适合的实证数据和建议的项目汇总措施的结构，在所有样本。结论这些观察结果对SF-12评分在老年人、PD患者和卒中幸存者中的有效性和可解释性提出了挑战。标准正交加权SF-12评分算法是值得注意的。相反，当假设的二维结构在数据中得到支持时，倾斜评分算法似乎更可取。不考虑基本的评分假设可能会产生误导性的结果。
Rationale, aims and objectives Studies have challenged the validity and underlying measurement model of the physical and mental component summary scores of the 36-item Short-Form Health Survey in, for example the elderly and people with neurological disorders. However, it is unclear to what extent these observations translate to physical and mental component summary scores derived from the 12-item short form (SF-12) of the 36-item Short-Form Health Survey. This study evaluated the construct validity of the SF-12 in elderly people and people with Parkinson's disease (PD) and stroke. Methods SF-12 data from a general elderly (aged 75+) population (n = 4278), people with PD (n = 159) and stroke survivors (n = 89) were analysed regarding data quality, reliability (coefficient alpha) and internal construct validity. The latter was assessed through item-total correlations, exploratory and confirmatory factor analyses. Results Completeness of data was high (9398.8%) and reliability was acceptable (0.780.85). Item-total correlations argued against the suggested items-to-summary scores structure in all three samples. Exploratory factor analyses failed to support a two-dimensional item structure among elderly and stroke survivors, and cross-loadings of items were seen in all three samples. Confirmatory factor analyses showed lack of fit between empirical data and the proposed items-to-summary measures structure in all samples. Conclusions These observations challenge the validity and interpretability of SF-12 scores among the elderly, people with PD and stroke survivors. The standard orthogonally weighted SF-12 scoring algorithm is cautioned against. Instead, when the assumed two-dimensional structure is supported in the data, oblique scoring algorithms appear preferable. Failure to consider basic scoring assumptions may yield misleading results.