Figure 2
From: Evaluation of non-response bias in a cohort study of World Trade Center terrorist attack survivors

Association between exposure and wave 2 PTSD - comparing wave 3 drop-outs with three-wave participants.
From: Evaluation of non-response bias in a cohort study of World Trade Center terrorist attack survivors
Association between exposure and wave 2 PTSD - comparing wave 3 drop-outs with three-wave participants.