SUMMARY
Trans-diagnostic approaches assume that most mental health disorders are behavioral manifestations of few functional units that represent a psychological risk towards the development of symptomatology. Psychological inflexibility is one of these trans-diagnostic units and evidence suggest that its components are risk factors that can predict emotional symptomatology and suicide risk levels. The present study aims to establish two classification models that predict the probability of having clinical levels of emotional symptomatology and higher suicide risk based on psychological inflexibility components. 513 people consented and completed an online survey as the only evaluation moment including Depression Anxiety and Stress Scales-21, Acceptance and Action Questionnaire - II, Cognitive Fusion Questionnaire, Perseverative Thinking Questionnaire, Valuing Questionnaire and Generalized Pliance Questionnaire as instruments. Participants had a mean age of approximately 27 years, the majority of them were cisgender, heterosexual and identified as women. Two dichotomous variables were created to classify clinical and high-risk cases, these variables were used as dependent on a backwards conditional binary logistic regression for each. Results show that psychological inflexibility is a trans-diagnostic risk factor for both emotional symptomatology and suicide risk. However, not every component was confirmed as a significant predictor. Experiential avoidance, cognitive fusion and repetitive negative thinking are supported as trans-diagnostic risk factors for emotional symptomatology, while only experiential avoidance and generalized pliance were predictive of a higher risk of committing suicide. In conclusion, the proposed models could be useful to identify clinical symptomatology or a higher risk of suicide, which is essential for the design and implementation of preventive interventions.