Validation of the semi-structured Psychotic Depression Assessment Scale (PDAS) interview
Acta Neuropsychiatrica, vol.30, no.3, pp.175-180, 2018 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 30 Issue: 3
- Publication Date: 2018
- Doi Number: 10.1017/neu.2017.15
- Journal Name: Acta Neuropsychiatrica
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.175-180
- Keywords: affective disorders, mood disorders, psychiatric status rating scales, psychometrics, psychotic
- Trakya University Affiliated: Yes
Abstract
Objective: Recently, a semi-structured interview dedicated to aid rating on the Psychotic Depression Assessment Scale (PDAS) was developed. Here, we aimed to validate PDAS ratings collected via this semi-structured interview. Methods: A total of 50 patients with psychotic depression - 34 with unipolar psychotic depression and 16 with bipolar psychotic depression - were recruited for the study. The following aspects of validity were investigated: clinical validity, psychometric validity (scalability), and responsiveness. Results: The PDAS ratings were clinically valid (Spearman's coefficient of correlation between PDAS total scores and Clinical Global Impressions scale - severity of illness ratings=0.66, p<0.001), scalable (Loevinger's coefficient of heterogeneity at endpoint=0.45), and responsive (no participants met the criterion for remission on the PDAS (total score <8) at baseline - at endpoint 74% (95% CI: 60-85) of the participants met this criterion). Conclusions: The semi-structured PDAS interview provides valid ratings of the severity of psychotic depression.