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

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

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)
  1. 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).