title: Psychometric properties of the Chinese versions of the Quick Inventory of Depressive Symptomatology - Clinician Rating (C-QIDS-C) and Self-Report (C-QIDS-SR).
abstract: BACKGROUND
  Developing accurate and time-efficient tools to measure depressive symptoms is important for research and clinical practice. This study aimed to test the psychometric properties of the Chinese version of the 16-item Quick Inventory of Depressive Symptomatology - Clinician Rating (C-QIDS-C) and Self-Report (C-QIDS-SR).
  
  
  METHODS
  This study included 998 patients with major depressive disorder (MDD) established using the Mini International Neuropsychiatric Interview (MINI). The severity of depressive symptoms was assessed using the Hamilton Rating Scale for Depression (HAMD), C-QIDS-C and C-QIDS-SR at baseline and 6 weeks later.
  
  
  RESULTS
  Internal consistency (Cronbach's alpha) ranged from 0.73 to 0.82 for C-QIDS-C and C-QIDS-SR at both the baseline and exit. The involvement and energy domains at baseline, and sad mood, concentration/decision making, self outlook, involvement and agitation/retardation domains at exit had the highest item-total correlations across the two C-QIDS scales. The C-QIDS-C and C-QIDS-SR total scores were highly correlated with the HAMD total score at both baseline (r=0.61, p<0.01 and r=0.54, p<0.01, respectively) and exit (r=0.75, p<0.01 and r=0.72, p<0.01, respectively). The C-QIDS-C, C-QIDS-SR and HAMD were equally sensitive to change of depressive symptoms, suggesting high concurrent validity. The C-QIDS-C and C-QIDS-SR showed uni-dimensional measurement properties in exploratory factor analyses at both baseline and exit.
  
  
  CONCLUSIONS
  The C-QIDS-C and C-QIDS-SR have excellent psychometric properties and are sensitive measurement of symptom severity in MDD.
authors.affiliation: Mood Disorders Center, Beijing Anding Hospital, Capital Medical University, China.
authors.forename: Jia
authors.initials: J
authors.lastname: Liu
authors.forename: Yu-Tao
authors.initials: YT
authors.lastname: Xiang
authors.forename: Gang
authors.initials: G
authors.lastname: Wang
authors.forename: Xiong-Zhao
authors.initials: XZ
authors.lastname: Zhu
authors.forename: Gabor S
authors.initials: GS
authors.lastname: Ungvari
authors.forename: Amy M
authors.initials: AM
authors.lastname: Kilbourne
authors.forename: Kelly Y C
authors.initials: KY
authors.lastname: Lai
authors.forename: Bao-Liang
authors.initials: BL
authors.lastname: Zhong
authors.forename: Ling
authors.initials: L
authors.lastname: Zhang
authors.forename: Qinge
authors.initials: Q
authors.lastname: Zhang
authors.forename: Yu-Chuan
authors.initials: YC
authors.lastname: Zou
authors.forename: Le
authors.initials: L
authors.lastname: Xiao
authors.forename: Qian
authors.initials: Q
authors.lastname: Zhao
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.forename: Jiang
authors.initials: J
authors.lastname: Wu
authors.forename: Guo-Fu
authors.initials: GF
authors.lastname: Zhang
authors.forename: Helen F K
authors.initials: HF
authors.lastname: Chiu
mesh_terms: D000328:Adult; D002681:China; D015928:Cognitive Behavioral Therapy; D003865:Major Depressive Disorder / Q000175:diagnosis* / Q000523:psychology / Q000628:therapy; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011569:Psychiatric Status Rating Scales; D011594:Psychometrics; D057566:Self Report; D017367:Selective Serotonin Reuptake Inhibitors / Q000627:therapeutic use
chemical_list: D017367:Selective Serotonin Reuptake Inhibitors