职业群体中自填式问卷20的内部一致性
Internal consistency of the self-reporting questionnaire-20 in occupational groups.
作者信息
Santos Kionna Oliveira Bernardes, Carvalho Fernando Martins, de Araújo Tânia Maria
机构信息
Departamento de Biofunção, Universidade Federal da Bahia, Salvador, BA, Brasil.
Departamento de Medicina Preventiva, Universidade Federal da Bahia, Salvador, BA, Brasil.
出版信息
Rev Saude Publica. 2016;50:6. doi: 10.1590/S1518-8787.2016050006100. Epub 2016 Mar 22.
OBJECTIVE
To assess the internal consistency of the measurements of the Self-Reporting Questionnaire (SRQ-20) in different occupational groups.
METHODS
A validation study was conducted with data from four surveys with groups of workers, using similar methods. A total of 9,959 workers were studied. In all surveys, the common mental disorders were assessed via SRQ-20. The internal consistency considered the items belonging to dimensions extracted by tetrachoric factor analysis for each study. Item homogeneity assessment compared estimates of Cronbach's alpha (KD-20), the alpha applied to a tetrachoric correlation matrix and stratified Cronbach's alpha.
RESULTS
The SRQ-20 dimensions showed adequate values, considering the reference parameters. The internal consistency of the instrument items, assessed by stratified Cronbach's alpha, was high (> 0.80) in the four studies.
CONCLUSIONS
The SRQ-20 showed good internal consistency in the professional categories evaluated. However, there is still a need for studies using alternative methods and additional information able to refine the accuracy of latent variable measurement instruments, as in the case of common mental disorders.
目的
评估自填式问卷调查（SRQ-20）在不同职业群体中的测量内部一致性。
方法
采用相似方法，对四项工人群体调查的数据进行了一项效度研究。共研究了9959名工人。在所有调查中，通过SRQ-20评估常见精神障碍。内部一致性考虑了每项研究中通过四分相关因子分析提取的维度所属项目。项目同质性评估比较了克朗巴赫α系数（KD-20）、应用于四分相关矩阵的α系数以及分层克朗巴赫α系数的估计值。
结果
考虑参考参数，SRQ-20维度显示出适当的值。在四项研究中，通过分层克朗巴赫α系数评估的工具项目内部一致性较高（>0.80）。
结论
SRQ-20在评估的职业类别中显示出良好的内部一致性。然而，仍需要使用替代方法和更多信息进行研究，以提高潜在变量测量工具（如常见精神障碍测量工具）的准确性。
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