Fig. 1.

Schematic illustration of the overall study design and the latent developmental trajectories of self-reported posttraumatic stress symptoms as measured by the Self-Report Inventory for PTSD (SRIP) over the study’s time period.

Note: Latent developmental trajectories and symptom scores are based on the full PRISMO sample as described in Ref. [1]; trajectory membership percentages are based on the sample of the present study; PTSD ​= ​posttraumatic stress disorder; methylation samples were available at the first three measurement points, PTSD symptom scores were available at all measurement points (pre-deployment up to five years post-deployment).