The ICD-11 and DSM-5-TR prolonged grief criteria: Validation of the Traumatic Grief Inventory-Self Report Plus using exploratory factor analysis and item response theory.

More recently, the prolonged grief disorder (PGD) has been recognized as a mental health disorder following bereavement, which is distinct from depression and PTSD. However, the number and proposed symptom items vary across the ICD-11 and the DSM-5-TR criteria for PG. The Traumatic Grief Inventory-Self Report Plus (TGI-SR+), which is an updated version of the TGI-SR, is currently the only robust instrument that assesses PG according to the ICD-11 and DSM-5-TR criteria. For research and clinical use among French-speaking countries, the forward-backward procedure was applied to translate the TGI-SR+ into French language. Exploratory factor analysis and parallel analysis converged towards a two-dimensional structure for the TGI-SR+, representing adaptation difficulties and traumatic separation distress. However, items mapping onto ICD-11 and DSM-5-TR criteria for PG represented a one-dimensional structure. Findings based on item response theory method provided strong evidence for discriminative characteristics of the items The internal reliability was excellent for the TGI-SR+ (McDonald’s ω = .97) and ICD-11 and DSM-5-TR criteria for PGD (McDonald’s ω = .95, respectively). We also demonstrated a very high temporal stability for the TGI-SR+ total score (ICC = .91, p < .0001) and ICD-11 PGD and DSM-5-TR PGD (ICC = .90, and ICC =.88, ps < .0001, respectively). The concurrent validity of the instrument was also demonstrated, such that the TGI-SR+ total score and all combinations were positively and significantly associated with the levels of depression, anxiety, and post-traumatic stress symptoms. However, the effect sizes were moderate. We conclude that for research and clinical use among French bereaved populations, the TGI-SR+ is a sound tool with very good psychometric properties.



Cyrille Kossigan Kokou-Kpolou,Lonneke I. M. Lenferink, Alice Einloft Brunnet, Sunyoung Park, Olga Megalakaki, Paul Boelen, Jude Mary Cénat | 2022
In: Clinical psychology & psychotherapy ; ISSN: 1099-0879 | 29 | 6 | 1950-1962
Anxiety Disorders, Bereavement, Depressive Disorders, Effects, French, Mental health, Posttraumatic Stress Disorder, Prolonged Grief Disorder, Psychotrauma, PTSD (DSM-5), PTSD (en), PTSD (ICD-11), Research
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