Pain and Posttraumatic Stress Symptom Clusters: A Cross-Lagged Study

Area of Science:

• Trauma and Injury Research
• Psychological Trauma
• Pain Management

Background:

• Pain and posttraumatic stress disorder (PTSD) frequently co-occur, yet the underlying mechanisms remain unclear.
• Understanding the interplay between pain and PTSD is crucial for effective treatment, particularly in trauma survivors.
• The Perpetual Avoidance Model suggests a link between PTSD symptoms and pain maintenance.

Purpose of the Study:

• To investigate the developmental and maintenance pathways of pain and PTSD symptom clusters (intrusions, avoidance, hyperarousal).
• To examine the bidirectional relationship between pain and PTSD symptom clusters in adults with burns over time.

Main Methods:

• Longitudinal study of 216 adults with burns.
• Assessment of PTSD symptom clusters (Impact of Event Scale-Revised) and pain (graphic numerical rating scale) at hospitalization, 3, and 6 months post-burn.
• Cross-lagged panel analysis to determine the temporal relationships between pain and PTSD symptom clusters.

Main Results:

• In-hospital intrusions predicted subsequent pain and avoidance.
• In-hospital pain predicted subsequent intrusions and avoidance, with a trend for hyperarousal.
• Later, PTSD intrusions predicted pain and hyperarousal, while pain predicted hyperarousal.

Conclusions:

• Pain and PTSD symptoms exhibit an entangled, bidirectional relationship.
• PTSD intrusions play a significant role in the maintenance of pain.
• Hyperarousal is unidirectionally related to pain, suggesting PTSD symptoms drive pain experiences.