Table 5.
Concurrent and divergent validity of the QIDS-SR 16 total score
| QIDS-SR 16 | CDSS | PANSS-D | ||
|---|---|---|---|---|
| Concurrent validity | QIDS-SR16 | 1 | ||
| CDSS | 0.44 (0.38-0.51)** | 1 | ||
| PANSS-D | 0.47 (0.41-0.54)** | 0.59 (0.54-0.64)** | 1 | |
| Divergent validity | PANSS-N | 0.28 (0.19-0.35)** | 0.34 (0.28-0.41)** | 0.40 (0.33-0.47)** |
| AIMS | 0.09 (0.01-0.16)* | 0.06 (−0.01-0.14) | 0.06 (−0.02-0.14) | |
| BARS | 0.16 (0.09-0.24)** | 0.09 (0.01-0.16)* | 0.15 (0.07-0.23)** | |
| UPDRS-motor | 0.13 (0.05-0.21)** | 0.20 (0.13-0.28)** | 0.25 (0.17-0.33)** |
Concurrent validity of the QIDS-SR16 total score with other depression instruments and divergent validity with negative symptoms and extrapyramidal symptoms. Values are Spearman correlation coefficients (95% CI). Significant correlations were indicated by * = p < .05; ** = p < .001.
Abbreviations: QIDS-SR 16 Quick Inventory of Depressive Symptoms 16-item self-report version; CDSS Calgary Depression Scale for Schizophrenia; PANSS Positive and Negative Syndrome Scale, emotional distress subscale (−D) and Negative symptom subscale (−N); AIMS Abnormal and Involuntary Movements Scale; BARS Barnes Akathisia Rating Scale and UPDRS-motor, Motor subscale of the Unified Parkinson’s Disease Rating Scale.