“…Partial PTSD is typically identified when affected individuals meet Criterion B (re-experiencing) and either Criterion C (avoidance and numbing) or D (arousal), or if they meet Criterion B and endorse at least one symptom each from Criteria C and D (Kulka, 1990; Schnurr, Ford, Friedman, Green, Dain, & Sengupta, 2000). Studies of partial PTSD in veterans (Favaro, Tenconi, Colombo, & Santonastaso, 2006; Grubaugh, Magruder, Waldrop, Elhai, Knapp, & Frueh, 2005; Jakupcak, Conybeare, Phelps, Hunt, Holmes, Felker, Klevens, & McFall, 2007; Kulka, 1990; Pietrzak, Goldstein, Malley, Johnson, & Southwick, 2009; Schnurr et al, 2000; Watson & Daniels, 2008), ambulance workers (Berger, Figueira, Maurat, Bucassio, Vieira, Jardim, Coutinho, Mari, & Mendlowicz, 2007), and survivors of toxic chemical exposures, disasters, and other traumas (Adams, Boscarino, & Galea, 2006; Berger et al, 2007; Breslau et al, 2004a; Jeon et al, 2007; Lai, Chang, Connor, Lee, & Davidson, 2004; Marshall, Olfson, Hellman, Blanco, Guardino, & Struening, 2001; Pietrzak, Goldstein, Southwick, & Grant, in press; Schutzwohl & Maercker, 1999; Stein, Walker, Hazen, & Forde, 1997; Zlotnick, Franklin, & Zimmerman, 2002) have found intermediate levels of psychiatric comorbidity and functional impairment compared to trauma-exposed individuals without PTSD and those with full PTSD. Partial PTSD can persist for years (Jeon et al, 2007; Schnurr et al, 2003).…”