As mentioned, PTSD is neither a common nor necessary outcome of serious trauma (Amir & Ramati, 2002; Blank, 1993; Delahanty et al., 2003; McFarlane, 1988), and a one-to-one correlation between objective measures of event severity and either acute PTSD symptom severity or chronic PTSD symptom persistence has not been established (Blank, 1993; Delahanty et al., 2003; McFarlane, 1988). Because “traumatized persons are notoriously reluctant to seek help for their symptoms, particularly from mental health practitioners” (Yehuda, 2002, p. 112), those treated for PTSD are considered only a small percentage of those with active symptoms or lifetime histories of PTSD. Prevalence studies conservatively suggest “5 to 6% of men and 10 to 14% of women had had PTSD at some time in their lives, making it the fourth most common psychiatric disorder” (Yehuda, p. 109). Sudden death of a loved one is the “single most frequent traumatic event to occur in both men and women” (Yehuda, p. 109), suggesting that PTSD may be related to unresolved loss. Moreover, because the nervous systems of many people with PTSD remain highly reactive even when they report few or no current uncomfortable symptoms of hyperarousal, re-experiencing, or avoidance, it is not surprising that the disorder has no single predictable course or outcome (Blank, 1993; McFarlane, 1988: see Appendix F).