Which classification of PTSD is characterized by the onset of symptoms at least 6 months after the traumatic event?

The classification of PTSD characterized by the onset of symptoms at least six months after the traumatic event is known as "delayed." This classification highlights that while the individual may have experienced a significant traumatic event, the psychological symptoms such as re-experiencing, avoidance, negative alterations in cognition and mood, and alterations in arousal and reactivity do not manifest until a considerable time has passed. This delayed onset can often complicate diagnosis and treatment, as individuals may not initially connect their symptoms to the traumatic experience.

In contrast, acute PTSD typically has symptoms that arise within three months of the event, and chronic PTSD describes symptoms persisting longer than a month but does not specify the timeline of symptom onset in relation to the traumatic event. Complex PTSD involves symptoms that arise from prolonged or repeated trauma but does not specifically address the delayed onset either.