Department of Health Service and Population Research; Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.
Centre for Longitudinal Studies, UCL Social Research Institute, University College London, London, UK.
Aging Ment Health. 2022 Nov;26(11):2285-2290. doi: 10.1080/13607863.2021.1963951. Epub 2021 Aug 19.
: To obtain evidence on the psychometric properties of the Patient Health Questionnaire - 9 (PHQ-9, one of the most extensively used tools for assessing depression) in the Brazilian older population. Data on 3,356 Brazilian adults aged 60+ years living in Guarulhos, São Paulo state were used. The factor structure of the questionnaire was analysed using a factor analysis approach. The questionnaire's measurement equivalence was tested across gender, age, personal income, and education level groups. The scores were compared across groups based on the highest level of equivalence achieved. The questionnaire's internal consistency was analysed considering its factor structure. A one-factor solution was identified as the most adequate factor structure, with the factor explaining 57.6% of the items' variance. The correlation of the resulting latent score with the overall raw sum score in the PHQ-9 was = 0.96. Measurement equivalence regarding thresholds and loadings was achieved for all tested groups. On average, women, older, less educated, and poorer people had higher latent scores on the depression factor. The measure showed a good internal consistency with Revelle's omega total ω=0.92. The results suggest that, among Brazilian older adults living in Guarulhos, São Paulo state, the PHQ-9 measures depressive symptomatology equivalently across different sociodemographic subgroups. Moreover, it can be scored using the raw sum of the item scores to adequately reflect different levels of depressive symptomatology.
为了获得有关患者健康问卷-9（PHQ-9，评估抑郁症最常用的工具之一）在巴西老年人群中的心理测量特性的证据。使用了来自巴西圣保罗州瓜鲁柳斯的 3356 名 60 岁以上的成年人的数据。使用因子分析方法分析了问卷的因子结构。测试了问卷在性别、年龄、个人收入和教育水平组之间的测量等效性。根据达到的最高等效水平，对各小组的分数进行了比较。根据其因子结构分析了问卷的内部一致性。确定了单因素解决方案作为最合适的因子结构，该因子解释了项目方差的 57.6%。由此产生的潜在分数与 PHQ-9 中总原始总分之间的相关性为 = 0.96。对于所有测试组，都实现了关于阈值和载荷的测量等效性。平均而言，女性、年龄较大、受教育程度较低和较贫困的人在抑郁因子上的潜在分数较高。该测量具有良好的内部一致性，Revelle 的全 ω=0.92。结果表明，在巴西圣保罗州瓜鲁柳斯生活的老年成年人中，PHQ-9 在不同的社会人口统计学亚组中对抑郁症状进行了等效的测量。此外，它可以使用项目得分的原始总和进行评分，以适当反映不同程度的抑郁症状。
