Peradeniya Depression Scale (PDS)

Information about Measure
First Name T.N.
Last Name Rajapske
Email Not Available
Affiliation Department of Psychiatry, University of Peradeniya, Sri Lanka
Other means of contacting author (e.g., website,, ResearchGate)
Mental health assessment tool that was adapted/developed/validated Peradeniya Depression Scale (PDS)
Mental health condition assessed Depressive Disorders
Idiom of distress included, if any “Saankaawa” (implies sadness and grief), “Bade gindara” (“fire in the abdomen), “Waatha amaaru” (generalized discomfort)
Lifestage of interest Adult (General)
Age range (age – age) 18+
Country or countries where tool was developed/adapted/validated Sri Lanka
Language(s) of the adapted/developed/validated tool Sinhalese
Clinical or community sample? Clinical
Subpopulation in which tool was developed/validated (e.g., tool was developed and tested among middle-class women)? Community members who were presenting to a psychiatry clinic for the first time and were suffering from current Major Depressive Episode.
Development procedures locally-developed,validated
If validated, what was the gold standard? Clinical diagnosis using the Structured Clinical Interview for DSM Disorders (SCID)
Description of other development procedures, if applicable
Cronbach’s alpha
Sensitivity 0.87
Spec 0.88
Other information about tool (e.g., additional psychometrics [NPV, PPV, Youden’s index, diagnostic odds ratio]) Area under the ROC curve was 0.95 (95% CI 0.91-0.99).
Citations of development/adaptation/validation studies and/or previous studies using the tool Abeyasinghe, D., Tennakoon, S., & Rajapakse, T. (2012). The development and validation of the Peradeniya Depression Scale (PDS)—A culturally relevant tool for screening of depression in Sri Lanka. Journal of Affective Disorders, 142(1-3), 143–149.
Notes when administering the tool The tool is intended to be used for depression screening by psychiatrists but could be used by anyone who is fluent in Sinhalese. All 25 items are summed with equal weight. A cut-off score of 10/25 is advised based on this initial validation.