Changes in diagnostic criteria of PTSD: implications from two prospective longitudinal studies

Area of Science:

• Psychiatry
• Psychology
• Military Mental Health

Background:

• Post-Traumatic Stress Disorder (PTSD) diagnosis has evolved across different editions of the Diagnostic and Statistical Manual of Mental Disorders (DSM).
• Previous research indicates variations in PTSD prevalence based on diagnostic criteria used.
• Understanding these variations is crucial for accurate assessment and treatment of veterans exposed to trauma.

Purpose of the Study:

• To compare PTSD rates using different DSM diagnostic criteria in veteran populations.
• To evaluate the impact of specific criteria, such as dysfunction, on PTSD diagnosis.
• To discuss the complexity of PTSD diagnosis and the significance of distress and dysfunction.

Main Methods:

• Two independent veteran samples were studied: Lebanon War (Study 1) and Yom Kippur War (Study 2).
• Participants included combat stress reaction (CSR) casualties, ex-Prisoners of War (POWs), and respective control groups.
• PTSD inventories based on DSM-III, DSM-III-R, and DSM-IV criteria were administered.

Main Results:

• PTSD rates were lower when more recent DSM criteria (DSM-IV) were applied compared to earlier versions (DSM-III, DSM-III-R).
• The dysfunction criterion was identified as a significant factor in PTSD diagnosis.
• Findings underscore the importance of both distress and dysfunction in the complex PTSD diagnostic process.

Conclusions:

• Diagnostic criteria evolution impacts PTSD prevalence estimates in veteran populations.
• The dysfunction criterion is a key component in accurately diagnosing PTSD.
• Accurate PTSD diagnosis requires careful consideration of distress and dysfunction, reflecting the disorder's complexity.