Department of Health Sciences and Research, College of Health Professions, Medical University of South Carolina, 77 President St, C101, MSC 700, Charleston, SC 29425, USA.
PM R. 2011 Jun;3(6):533-40; quiz 540. doi: 10.1016/j.pmrj.2011.03.003.
To examine the factor structure of the Patient Health Questionnaire-9, a measure of depression, in persons with spinal cord injury (SCI).
Cross-sectional, confirmatory factor analytic study.
Community.
Data for 7296 persons with an SCI who had sustained their injury at least 1 year prior to assessment and who had complete Patient Health Questionnaire-9 data collected at a follow-up interview were drawn from the National Spinal Cord Injury Statistical Center Database.
None.
Factor structure of the Patient Health Questionnaire-9.
Confirmatory factor analysis indicated a marginal fit for the single factor solution (root mean square error of approximation [RMSEA] = 0.086), whereas the solution with 5 somatic items and 4 nonsomatic items had the best fit (RMSEA = 0.054) among 2-factor models that used all 9 items. Of the models that used fewer than 9 items, the best fit was for the 6-item solution with 3 somatic items (sleep, appetite, and fatigue) and 3 nonsomatic items (feeling down, feeling bad about self, and suicidal ideation; RMSEA = 0.043). Similar results were found across the strata except for the Hispanic group (for whom no model fit well).
Given the results of this analysis that support a 2-factor structure of the Patient Health Questionnaire-9 in persons with SCI, the next step in this line of research is to validate each of these dimensions against other ways of measuring depression.
检验用于评估脊髓损伤（SCI）患者抑郁程度的患者健康问卷-9 （PHQ-9）的因子结构。
横断面、验证性因子分析研究。
社区。
从国家脊髓损伤统计中心数据库中抽取了 7296 名在评估前至少 1 年发生 SCI 且在随访访谈中完整收集 PHQ-9 数据的 SCI 患者的数据。
无。
PHQ-9 的因子结构。
验证性因子分析表明，单因子模型的拟合度尚可（近似均方根误差 [RMSEA] = 0.086），而使用所有 9 个项目的 2 因子模型中，包含 5 个躯体项目和 4 个非躯体项目的模型拟合度最佳（RMSEA = 0.054）。在使用少于 9 个项目的模型中，拟合度最佳的是包含 3 个躯体项目（睡眠、食欲和疲劳）和 3 个非躯体项目（情绪低落、自我感觉不好和自杀意念）的 6 项模型（RMSEA = 0.043）。除了西班牙裔群体（没有模型拟合较好），在其他各亚组中都得到了类似的结果。
鉴于这项分析支持 SCI 患者 PHQ-9 的 2 因子结构，下一步研究是针对每种维度，用其他方法测量抑郁程度进行验证。
