Latinx immigrants’ trauma symptoms linked to migration experiences in new study

The journey to the United States may be leaving a distinct psychological mark on Latinx migrants, one that goes beyond the violence many of them fled in the first place. That is the central finding of a new study published in the Journal of Behavioral Medicine, which shows that traumatic experiences during the migration journey itself predict posttraumatic stress symptoms in both recently immigrated youth and adults, even after accounting for the trauma they endured before leaving home. With approximately 422,325 migrants arriving at the southern U.S. border in 2024, and a quarter of them from Central America, the research arrives at a moment when asylum processing has been halted as part of sweeping immigration enforcement actions, making the findings both timely and urgent.

The research team, led by Renee M. Frederick of the University of Houston and including collaborators from Palo Alto University, the University of Texas Rio Grande Valley, Rice University, and the Universidad de Guadalajara, analyzed two independent samples of Latinx migrants collected roughly six years apart. The first sample comprised 69 recently immigrated Latinx youth, ages 15 to 25, recruited from a high school in southeastern Texas serving newcomer students, with data collected between 2015 and 2016. The second sample included 276 Latinx adults, ages 18 to 71, recruited in May 2023 at two sites along the U.S.-Mexico border: a humanitarian respite center in McAllen, Texas, and a migrant encampment in Reynosa, Tamaulipas, Mexico. Nearly 90 percent of the adults were seeking asylum in the United States.

What makes the study methodologically significant is its attempt to disentangle the effects of pre-migration trauma from the effects of the journey itself. Prior research has documented staggering rates of trauma exposure among Latinx migrants. Studies cited by the authors found that 83 percent of Central American migrants at the Texas border cited violence, largely gang-related or domestic, as a primary motivation for migration, and that 32 percent met diagnostic criteria for posttraumatic stress disorder. Among immigrant youth, one study reported that 60 percent had clinically significant PTSD symptoms. Against a general U.S. population prevalence of posttraumatic stress ranging from 2 to 8 percent, rates as high as 60 percent in Latinx immigrant samples signal what the researchers describe as a growing public health crisis.

To measure these constructs, the team used well-validated Spanish-language instruments. Pre-migration trauma in youth was assessed with the Adverse Childhood Experiences questionnaire, a ten-item measure covering abuse, neglect, and household dysfunction. In adults, pre-migration trauma was measured with an adapted version of the Harvard Trauma Questionnaire, which includes 19 yes-or-no items covering events such as physical assault, sexual violence, property destruction, and the murder of family or friends. Migration experiences were captured through the Migration Experiences Interview, a 25-item semi-structured assessment covering journey duration, hunger, thirst, exhaustion, frightening events, and whether individuals traveled with family. Posttraumatic stress symptoms were measured with the Child PTSD Symptom Scale in youth and the Impact of Event Scale-Revised in adults, both of which showed high internal consistency in these samples.

The statistical approach was a hierarchical regression analysis conducted separately for each sample, with variables entered in four sequential blocks. Demographic covariates, including age, gender, and country of birth, were entered first. Pre-migration trauma was entered second, allowing the researchers to control for its confounding influence. Migration journey trauma, captured by a single item asking whether individuals witnessed or experienced something frightening during migration, was entered third. Finally, other migration-related factors, such as traveling with family, journey length, hunger, thirst, and exhaustion, were entered fourth to test whether they contributed anything further.

The results were striking in their consistency. In the youth sample, the final model explained 26.6 percent of the variance in posttraumatic stress symptoms. Pre-migration trauma added 11.6 percent of explained variance beyond demographics, and migration journey trauma contributed an additional 5.2 percent. Three variables emerged as unique predictors: pre-migration trauma exposure, witnessing or experiencing something frightening during migration, and country of birth. In the adult sample, the model explained 33.2 percent of the variance, with pre-migration trauma accounting for 22.7 percent and migration trauma for an additional 6.8 percent. Again, witnessing or experiencing something frightening during the journey was a unique predictor, alongside pre-migration trauma and self-reported gender. In both samples, the other migration hardships, such as hunger, thirst, exhaustion, and traveling alone, did not add statistically significant explanatory power once migration trauma was in the model.

The clinical severity of symptoms observed was substantial. Youth in the sample had a mean score of 15.41 on the Child PTSD Symptom Scale, placing the average child in the moderate severity range, with a maximum score of 46 indicating that some children fell in the severe or extremely elevated range. Adults had a mean Impact of Event Scale-Revised score of 41.74, well above the threshold of roughly 30 to 33 typically considered clinically significant. The fact that both cohorts, despite being collected under different presidential administrations and different immigration policies, exhibited comparably high symptom burdens suggests to the researchers that migration-related stressors reflect persistent structural conditions rather than transient political circumstances.

The authors situate their findings within a conceptual model in which migration trauma acts as an additional driver of psychological distress in an already trauma-exposed population. For many migrants, particularly those from South America, the journey includes crossing the Darién Gap, a remote jungle route between Colombia and Panama associated with armed groups, sexual violence, human trafficking, disease, injury, and near-total absence of healthcare. Prior research cited in the study reports that more than half of Latinx immigrant youth in one sample experienced violence, including robbery, physical assault, and sexual assault, during migration itself. Unaccompanied minors may be especially vulnerable because they lack caregivers who could buffer the stress of the journey, while family separation during transit or detention can disrupt attachment relationships and compound the harm.

The researchers acknowledge several limitations. The youth sample was small, which limits the stability and generalizability of the model, and the use of a single binary item to capture migration-related trauma cannot reflect the frequency, severity, or type of frightening events experienced. The cross-sectional, observational design prevents causal inference, and different posttraumatic stress measures across the two samples limit direct comparisons of symptom severity. Certain migration variables, such as mode of transportation, time spent in immigration detention, and smuggler involvement, had insufficient variability for analysis. Community-based convenience sampling may also limit generalizability to migrants who never access formal services.

Even so, the practical implications are considerable. The authors call for routine, trauma-informed screening of Latinx migrants in clinical, educational, and community settings, using brief culturally responsive tools such as the Migration Experiences Interview that do not require specialized clinical expertise. They argue that screening should be integrated into primary care clinics, schools, NGOs, transitional shelters, and border processing centers, and that interventions delivered by community health workers and school-based teams could offer timely support where specialty providers are scarce. At the policy level, the findings add to evidence that the humanitarian situation at the southern border is fundamentally a mental health crisis. As the United States restricts legal paths to entry, the researchers warn that migrants are being pushed into more dangerous and traumatic routes, and they urge the expansion of safe, legal migration channels as a form of preventive public health policy. Future research, they note, should employ longitudinal and mixed-methods designs to trace symptom trajectories over time and to identify protective factors, such as family cohesion and community support, that might buffer the effects of migration trauma on newcomer families.