Posttraumatic Stress Disorder Near and Far: Symptom Networks From 2 to 12 Months After the Virginia Tech Campus Shootings

Posttraumatic stress disorder (PTSD) is unique in its longitudinal focus. To better understand how PTSD develops, we used network analysis in a longitudinal sample of survivors of the 2007 Virginia Tech campus shootings. Participants were 212 women who completed surveys at both 2 and 12 months after the shooting. Using within-group permutation tests, we found that overall network strength significantly increased and overall network structure...