Cassiani-Miranda Carlos Arturo, Vargas-Hernández María Camila, Pérez-Anibal Eduard, Herazo-Bustos Mariana Isabel, Hernández-Carrillo Mauricio
Grupo de Investigación en Salud Pública, Universidad Santiago de Cali, Cali, Colombia Fundación Universitaria San Martín, Cali, Colombia.
Biomedica. 2017 Apr 1;37(0):112-120. doi: 10.7705/biomedica.v37i0.3221.
Depression among university students must be screened with valid instruments. The Patient Health Questionnaire (PHQ-9) is reliable and valid for screening depression in a university context; however, its psychometric performance in Colombia is unknown.
To estimate the reliability and dimensionality of PHQ-9 as a screening instrument for depressive symptoms among health sciences students of a university in Cartagena, Colombia.Materials y methods: We analyzed the factorial structure and reliability of the PHQ-9 in a sample of 550 students for expected prevalence of clinically-meaningful depressive symptoms (CMDS) of 25% with a confidence level of 95% and an error level of 3%. We used the free Spanish version of PHQ-9 for Colombia, authorized by its creators. A confirmatory factorial analysis, and an estimate of internal consistency using Cronbach´s alfa and McDonald´s omega were obtained.
We analyzed 541 surveys. The average age of the group was 20.18 (SD=2.59) years old, 354 (63.77%) participants were women and 196 (36.23%) men. CMDS prevalence was 27.3%. The confirmatory factorial analysis exhibited a two-factor model, which explained the total variance of 42.80%. The proportion of variance explained by the factors was 0.243 (item 5) and 0.587 (item 2). Cronbach´s alfa was 0.830 and McDonald´s omega, 0.89.
PHQ-9 was a valid and reliable tool for screening depressive symptoms among health sciences students in a university in Cartagena, Colombia.
必须使用有效的工具对大学生中的抑郁症进行筛查。患者健康问卷（PHQ - 9）在大学环境中筛查抑郁症是可靠且有效的；然而，其在哥伦比亚的心理测量学表现尚不清楚。
评估PHQ - 9作为哥伦比亚卡塔赫纳一所大学健康科学专业学生抑郁症状筛查工具的信度和维度。
我们对550名学生样本中PHQ - 9的因子结构和信度进行了分析，预期具有临床意义的抑郁症状（CMDS）患病率为25%，置信水平为95%，误差水平为3%。我们使用了经其创作者授权的哥伦比亚免费西班牙语版PHQ - 9。获得了验证性因子分析以及使用克朗巴赫α系数和麦克唐纳ω系数对内部一致性的估计。
我们分析了541份调查问卷。该组的平均年龄为20.18岁（标准差 = 2.59），354名（63.77%）参与者为女性，196名（36.23%）为男性。CMDS患病率为27.3%。验证性因子分析呈现出一个双因子模型，解释了总方差的42.80%。各因子解释的方差比例分别为0.243（项目5）和0.587（项目2）。克朗巴赫α系数为0.830，麦克唐纳ω系数为0.89。
PHQ - 9是哥伦比亚卡塔赫纳一所大学健康科学专业学生抑郁症状筛查的有效且可靠工具。
