RESUMO
The aim of the present study is to describe the prevalence and individual predictors of mental distress (anxiety, depression, and burnout) in a sample of volunteers engaged in emergency services. A total of 823 volunteers enrolled in the Red Cross auxiliary corps were surveyed between 28 June 2021 and 28 August 2021 (299 men and 524 women). After deployment in anti-COVID-19 operations, participants completed the Patient Health Questionnaire, Generalized Anxiety Disorder Questionnaire, Maslach Burnout Inventory, and Big Five Inventory through an online platform. A moderately severe risk of depression was found in 1.70% of the sample. A severe risk for anxiety disorders was found in 1.82%. A high risk for emotional exhaustion was found in 3.40%, depersonalization in 12.88%, and low personal accomplishment in 7.53%. Women showed a higher risk of both depression and anxiety in comparison to males. Personality factors were significant predictors for all dimensions. In contrast to the current literature, openness was found to be a predisposing personality factor in developing burnout dimensions. The relevance of the current findings for the development of effective screening tools before the deployment of reserve forces during medical crises is discussed.