Screening for psychotrauma related symptomatology: Greek adaptation and validation of the Global Psychotrauma Screen

<b>Background:</b> Traumatizing experiences significantly impact mental health outcomes, underscoring the need for a concise yet comprehensive assessment tool. The <i>Global Psychotrauma Screen</i> (GPS) was developed to address this gap. Although the GPS has been translated into over 30 languages, including Greek, its cross-cultural validity remains unexamined.<b>Aim:</b> The aim of this study was to evaluate the validity and reliability of the Greek GPS.<b>Method:</b> Study 1 involved 1418 participants who completed an online questionnaire<b>,</b> which assessed trauma-related symptoms using the GPS, <i>the Posttraumatic Stress Disorder Checklist for DSM-5</i>, the <i>International Trauma Questionnaire</i>, the <i>Symptom Checklist-90-R</i>, the <i>Brief-Coping Orientation to Problems Experienced Inventory</i>, the <i>Brief Resilience Scale</i> and the <i>Multidimensional Scale of Perceived Social Support</i>. The dataset from Study 1 was utilized for exploratory factor analysis. Study 2 included a dataset of 971 participants drawn from the Greek adaptation of the CARTS protocol, which was used to conduct confirmatory factor analysis.<b>Results:</b> The results showed satisfactory internal consistency as well as test-retest reliability, convergent and divergent validity of the GPS. The exploratory and confirmatory factor analyses supported a univariate structure of the GPS-Symptoms, with all symptom items exhibiting moderate to high loadings on the underlying factor and the solution accounting for 63.6% and 48.1% of the total variance in study 1 and study 2, respectively, and the univariate model fit indices being <i>X²</i>(112) <i>=</i> 282.349, <i>p</i> <i><</i> .001, CFI = . 947, SRMR = .039, RMSEA = .040 [90% CI: 0.34-0.045], ECVI = .376 [90% CI: 0.33-.43]. All risk factors were significantly related to each of the GPS-Symptoms. Regression analyses revealed that gender and risk factors significantly predicted GPS-Symptoms.<b>Conclusion:</b> The current study provides preliminary evidence supporting the use of the Greek GPS as a valid and reliable tool for assessing transdiagnostic symptoms following trauma exposure.