A veteran who served in a combat zone is admitted to the inpatient psychiatric unit for severe anxiety and disrupted sleep. The nurse conducts a mental health assessment. Which client statement most strongly supports a diagnosis of posttraumatic stress disorder (PTSD)?

A. "I get anxious sometimes when I'm in crowded places like shopping centers.": While this indicates anxiety, it is nonspecific and does not directly relate to trauma re-experiencing, a core symptom of PTSD. B. "I try not to talk about the war much-it's in the past, and I've moved on.": Avoidance is a symptom of PTSD, but this statement alone does not demonstrate active re-experiencing or distress related to the trauma. C. "I think about the war more than I'd like, especially when I see the news.": Intrusive thoughts are a symptom of PTSD, but the statement is less vivid and less immediate in describing the intensity of the trauma response compared with actual nightmares. D. "I wake up in a sweat almost every night because I'm back on the battlefield in my dreams.": This statement demonstrates re-experiencing trauma through recurrent nightmares, a hallmark symptom of PTSD. The vividness and physiological response strongly support the diagnosis and indicate significant distress.