Does the 12-item General Health Questionnaire contain multiple factors and do we need them?
Does the 12-item General Health Questionnaire contain multiple factors and do we need them?
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DOI：
10.1186/1477-7525-2-63
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发表时间：
2004-11-11
影响因子：
3.6
通讯作者：
Cheung YB
中科院分区：
文献类型：
--
作者：
Gao F;Luo N;Thumboo J;Fones C;Li SC;Cheung YB
12 项一般健康问卷 (GHQ-12) 作为一维工具被广泛使用，但因素分析往往表明它包含两个或三个因素。对于 GHQ-12 因子（如果存在）在揭示患者之间临床状态和健康相关生活质量差异方面的作用，我们知之甚少。我们在新加坡心理障碍门诊患者的横断面调查中解决了这个问题。参与者 (n = 120) 完成了 GHQ-12、贝克焦虑量表和简式 36 健康调查。使用验证性因子分析来比较先前提出的 GHQ-12 的六种因子结构。结合临床和健康相关的生活质量变量评估最佳拟合模型的因子评分以及 GHQ-12 总体评分。 Graetz 提出的三因素模型比一维模型、两个二因素模型和另外两个三因素模型更好地拟合数据。然而，这三个因素密切相关。他们的价值观在临床和健康相关的生活质量变量方面以类似的方式变化。 12项一般健康问卷包含三个因素，即焦虑和抑郁、社交功能障碍和丧失信心。然而，单独使用它们在区分临床组或识别与临床或健康相关的生活质量变量的关联方面并没有提供许多实际优势。
The 12-item General Health Questionnaire (GHQ-12) is widely used as a unidimensional instrument, but factor analyses tended to suggest that it contains two or three factors. Not much is known about the usefulness of the GHQ-12 factors, if they exist, in revealing between-patient differences in clinical states and health-related quality of life. We addressed this issue in a cross-sectional survey of out-patients with psychological disorders in Singapore. The participants (n = 120) completed the GHQ-12, the Beck Anxiety Inventory, and the Short-Form 36 Health Survey. Confirmatory factor analysis was used to compare six previously proposed factor structures for the GHQ-12. Factor scores of the best-fitting model, as well as the overall GHQ-12 score, were assessed in relation to clinical and health-related quality of life variables. The 3-factor model proposed by Graetz fitted the data better than a unidimensional model, two 2-factor models, and two other 3-factor models. However, the three factors were strongly correlated. Their values varied in a similar fashion in relation to clinical and health-related quality of life variables. The 12-item General Health Questionnaire contains three factors, namely Anxiety and Depression, Social Dysfunction, and Loss of Confidence. Nevertheless, using them separately does not offer many practical advantages in differentiating clinical groups or identifying association with clinical or health-related quality of life variables.