In distinguishing PTSD from acute stress disorder, what historical feature is crucial for diagnosis?

The distinction between PTSD (Post-Traumatic Stress Disorder) and acute stress disorder is primarily based on the duration of the symptoms experienced after a traumatic event. Acute stress disorder is diagnosed when symptoms arise within three days to one month following the trauma, while PTSD is diagnosed when symptoms persist for more than one month. This temporal aspect is critical for making an accurate diagnosis and guides appropriate treatment options.

The other options, such as headaches, insomnia, and nightmares, can be symptoms associated with both disorders but are not definitive for distinguishing between acute stress disorder and PTSD. They may manifest in either condition, but the key feature for differentiating these two diagnoses is the time frame during which symptoms are present. Understanding this difference is essential for effective management and intervention in individuals experiencing trauma-related symptoms.