Rosario-Hernández Ernesto, Rovira-Millán Lillian V, Merino-Soto César, Angulo-Ramos Marisol
Clinical Psychology Programs, School of Behavioral and Brain Sciences, Ponce Health Sciences University, Ponce, Puerto Rico.
Ponce Research Institute, Ponce Health Sciences University, Ponce, Puerto Rico.
Front Psychiatry. 2023 Feb 14;14:1024676. doi: 10.3389/fpsyt.2023.1024676. eCollection 2023.
This study aimed to examine the internal structure and assess the psychometric properties of the Patient Health Questionnaire (PHQ-9) in a Puerto Rican sample of workers. This instrument is a nine-item questionnaire, which was conceptualized as a unidimensional structure; however, there are mixed results regarding this internal structure. This measure is used in the occupational health psychology context in organizations in Puerto Rico; nevertheless, there is little evidence of its psychometric properties with samples of workers.
A total of 955 samples from two different study samples were used in this cross-sectional study design in which the PHQ-9 was used. We conducted confirmatory factor analysis, bifactor analysis, and random intercept item factor analysis to examine the internal structure of the PHQ-9. Moreover, a two-factor model was examined by randomly assigning items to the two factors. Measurement invariance across sex and the relationship with other constructs were examined.
The best-fitted model was the bifactor model followed by the random intercept item factor. The five sets of two-factor models with items randomly assigned obtained acceptable and similar fit indices regardless of the items.
The results suggest that the PHQ-9 appears to be a reliable and valid instrument to measure depression. The more parsimonious interpretation of its scores, for now, is a unidimensional structure. Comparison across sex appears to be useful in occupational health psychology research settings since the results suggest that the PHQ-9 is invariant regarding this variable.
本研究旨在检验波多黎各工人样本中患者健康问卷（PHQ - 9）的内部结构并评估其心理测量特性。该工具是一份包含九个条目的问卷，其概念化为单维结构；然而，关于这种内部结构的结果存在分歧。此测量方法在波多黎各各组织的职业健康心理学背景中使用；不过，几乎没有证据表明其在工人样本中的心理测量特性。
在这项使用PHQ - 9的横断面研究设计中，共使用了来自两个不同研究样本的955个样本。我们进行了验证性因素分析、双因素分析和随机截距项目因素分析，以检验PHQ - 9的内部结构。此外，通过将条目随机分配到两个因素来检验一个双因素模型。检验了性别间的测量不变性以及与其他构念的关系。
拟合度最佳的模型是双因素模型，其次是随机截距项目因素模型。无论条目如何，五组随机分配条目的双因素模型都获得了可接受且相似的拟合指数。
结果表明，PHQ - 9似乎是一种测量抑郁的可靠且有效的工具。目前，对其分数更简约的解释是单维结构。在职业健康心理学研究环境中，跨性别比较似乎是有用的，因为结果表明PHQ - 9在该变量上具有不变性。
