Psychometric properties of the Italian Traumatic Grief Inventory-Self Report Plus (TGI-SR+)

The Traumatic Grief Inventory–Self Report Plus (TGI-SR+) is a widely used and reliable tool assessing Prolonged Grief Disorder (PGD) symptoms. This study examined the factorial structure and psychometric properties of the Italian TGI-SR+. A community sample of 308 participants aged 18–65 (M = 37.9, SD = 14.5) with 78.2% women completed the TGI-SR+ and measures of psychological distress, post-traumatic symptoms, and quality of life. Confirmatory factor analysis supported a unidimensional model. Reliability was excellent. In total, 6.2% met criteria for DSM-5-TR and ICD-11 PGD (cutoff ≥71), and 3.9% for DSM-5 Persistent Complex Bereavement Disorder (PCBD; cutoff ≥75). PGD scores differed by gender and cause of death, with higher severity in women and sudden losses. The Italian TGI-SR+ showed good convergent and known-group validity, supporting its use in clinical assessment and research on psychological and social factors involved in the onset and course of PGD.