Validation of the Persian Traumatic Grief Inventory- Self Report Plus (TGI-SR+) to Assess Prolonged Grief Severity

Abstract

The Traumatic Grief Inventory-Self Report Plus (TGI-SR+) is a self-report measure to assess Prolonged Grief Disorder (PGD) in terms of ICD-11 and DSM-5-TR. Till now this measure has shown to yield good psychometric properties in Dutch and French speaking bereaved people. This study aimed to evaluate the psychometric properties of the Persian TGI-SR+. 461 individuals (280 women) fully completed the scales. The participants were recruited using convenience sampling. The Confirmatory factor analysis and concurrent validity, and reliability of the Persian version of the TGI-SR+ were evaluated. Confirmatory factor analysis results of a two-dimensional model support the construct validity of this version of the TGI-SR+, while concurrent validity was shown with significant correlations between the TGI-SR+ and measures of depression, anxiety, and ptsd. These results indicate satisfactory psychometric properties of the instrument, thus supporting the use of the TGI-SR + as a valid measure of PGD in bereaved Iranian adults.