Psychometric properties of the self-report version of the Quick Inventory of Depressive Symptoms (QIDS-SR16) questionnaire in patients with schizophrenia

Table 4 Spearman correlations (95%CI) of QIDS-SR ₁₆ symptom domains with the CDSS total score

QIDS-SR₁₆domains	Correlation
Sleep disturbance	0.22 (0.14-0.30)
Depressed (sad) mood	0.46 (0.38-0.52)
Change in appetite or weight	0.14 (0.07-0.22)
Concentration/decision making	0.27 (0.19-0.34)
Self-view	0.36 (0.28-0.43)
Suicidal ideation	0.38 (0.31-0.45)
Interest	0.33 (0.24-0.40)
Energy/fatigue	0.28 (0.21-0.35)
Psychomotor agitation/retardation	0.28 (0.20-0.35)

Abbreviations: QIDS-SR ₁₆ Quick Inventory of Depressive Symptoms 16-item self-report version; CDSS Calgary Depression Scale for Schizophrenia. All correlations were significant (p < .001).

ISSN: 1471-244X