Trajectories of mental health problems in unaccompanied young refugees in Germany and the impact of post-migration factors - a longitudinal study.

Unaccompanied young refugees (UYRs) are at an elevated risk of continuing psychological distress, including posttraumatic stress symptoms (PTSS), depression, and anxiety. The post-arrival situation in a host country plays an important role in increasing or reducing mental health risks for UYRs. This study aimed to examine the trajectory of psychological distress and post-migration factors experienced by UYRs in Germany with five assessments every six months over a two-year period.Standardised self-report questionnaires were used to assess PTSS (CATS-2), depression (PHQ-9), and anxiety (GAD-7) symptoms. Material and social stressors (DSSYR), sociocultural adjustment (BSAS), frequency of contact with family members, and distress regarding asylum status were included as post-migration factors. N = 131 UYRs (M = 17.04; SD = 1.46; 81.1% male) living in residential care facilities in Germany were included in this study. There was a significant loss to follow up with n = 77 after 12 months at T2 (59% attrition), and n = 37 after 24 months at T4 (28% attrition).At baseline, clinically relevant symptom scores were found in 48.1% for PTSS, 42.0% for depression, and 22.9% for anxiety. Analysis of latent growth curve models revealed that the symptom severity of depression and anxiety did not change substantially over one year, but PTSS showed a significant decline. The number of traumatic events affected initial levels of mental health problems but not their trajectory over time. The impact of post-migration factors varied between measurement points and outcome measures and did not result in a homogeneous pattern.Despite limitations, this study demonstrated the persistence of high levels of psychological distress in UYRs. Effective interventions are required at an early stage to prevent chronic trajectories and support systems should adapt to constantly changing circumstances.Trial registration number/date of registration: DRKS00017453/11th December 2019.