School of Public Health, The University of Hong Kong, Hong Kong, China.
J Affect Disord. 2011 Nov;134(1-3):444-7. doi: 10.1016/j.jad.2011.05.007. Epub 2011 Jun 12.
This study investigates the psychometric properties of the Patient Health Questionnaire-2 (PHQ-2) in the general population of Hong Kong.
Random sampling was used to recruit 6028 participants aged 15 years or over. Among them, 203 were surveyed twice within a two-week period. Participants completed the Chinese version of the PHQ-9 (including 2 items of the PHQ-2), the Chinese Health Questionnaire, the Happiness Scale, the SF-12, and questions about diagnosis and health service utilization. Internal consistency, test-retest reliability, construct and discriminant validity of the PHQ-2 were assessed.
Cronbach's α was 0.76. The test-retest reliability over two weeks calculated by intraclass correlation was 0.70. Spearman correlation results showed that the PHQ-2 score was associated with the remaining seven items of the PHQ-9 (r = 0.53), the Chinese Health Questionnaire (r = 0.37), and the Happiness scale (r = -0.32). As expected, the strength of the correlation between the PHQ-2 and the SF-12 Physical Component Summary was lower (r = -0.29) than that with the SF-12 Mental Component Summary (r = -0.50). Participants with higher PHQ-2 scores more frequently reported having received a depression diagnosis made by a doctor, having chronic illness, using medicine, and utilizing health services. Using the cutoff point ≥ 3, 4.2% of participants screened positive for Major Depressive Disorder.
We did not use diagnostic interviews or other depression measures to test the PHQ-2's relative performance in screening for depression.
This study provides evidence for the PHQ-2 as a reliable and valid screening tool for depressive symptoms among a randomly recruited community sample in Hong Kong.
本研究旨在调查香港一般人群中患者健康问卷-2（PHQ-2）的心理测量特性。
采用随机抽样的方法招募了 6028 名 15 岁及以上的参与者。其中 203 名参与者在两周内接受了两次调查。参与者完成了中文版本的 PHQ-9（包括 PHQ-2 的 2 个项目）、中文版健康问卷、幸福感量表、SF-12 量表以及关于诊断和卫生服务利用的问题。评估了 PHQ-2 的内部一致性、重测信度、结构和判别效度。
克朗巴赫α系数为 0.76。两周内通过组内相关系数计算的重测信度为 0.70。Spearman 相关结果表明，PHQ-2 评分与 PHQ-9 的其余 7 个项目（r = 0.53）、中文版健康问卷（r = 0.37）和幸福感量表（r = -0.32）相关。正如预期的那样，PHQ-2 与 SF-12 生理成分综合得分的相关性较弱（r = -0.29），而与 SF-12 心理成分综合得分的相关性较强（r = -0.50）。PHQ-2 评分较高的参与者更频繁地报告接受过医生做出的抑郁症诊断、患有慢性病、使用药物和利用卫生服务。使用截断值≥3，4.2%的参与者筛查出患有重度抑郁症。
我们没有使用诊断访谈或其他抑郁测量来测试 PHQ-2 在筛查抑郁症方面的相对表现。
本研究为 PHQ-2 作为一种可靠有效的香港随机招募社区样本中抑郁症状筛查工具提供了证据。
