Posttraumatic Stress Dynamics and 15-Year Persistence in Great East Japan Earthquake Survivors

In this 15-year cohort study of GEJE survivors, symptom escalation during the first-to-second year interval was identified as the most prevalent pattern and was a factor associated with long-term persistent PTSRs. Because early symptom dynamics offer superior prognostic accuracy compared with single-point assessments, these findings support a serial screening approach during the immediate postdisaster period to optimize risk stratification and early intervention strategies.

Corresponding Author: Hiroaki Tomita, MD, Department of Psychiatry, Graduate School of Medicine, Tohoku University, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8574, Japan (hiroaki.tomita.a8@tohoku.ac.jp).

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