Low specificity of symptoms on the post-traumatic stress disorder (PTSD) symptom scale: a comparison of individuals with PTSD, individuals with other anxiety disorders and individuals without psychopathology.
OBJECTIVE
Screening for post-traumatic stress disorder (PTSD) takes place in clinical and research settings where diagnostic interviews are not feasible, and typically relies on self-report instruments like the PTSD symptom scale (PSS). Concerns have been raised about the specificity of PTSD symptoms assessed by questionnaires. This study examined whether the PSS distinguishes between patients with PTSD and those with other anxiety disorders or healthy controls.


METHODS
A between-participants design was employed.


METHODS
The participants were 65 individuals with PTSD, 40 individuals with other anxiety disorders and 40 healthy controls. They completed the PSS with respect to a range of stressful life-events.


RESULTS
Using this instrument, 86% of individuals with PTSD and 5% of healthy controls endorsed sufficient symptoms to meet the PTSD diagnosis. This was also the case for 43% of individuals with other anxiety disorders, and self-reported symptoms related to traumatic events and aversive events that are generally not considered traumatic.


CONCLUSIONS
The findings suggest that many people screened positive for PTSD may actually be suffering from another anxiety disorder.
Engelhard
Iris M
IM
Clinical and Health Psychology, Utrecht University, Utrecht, The Netherlands. i.m.engelhart@uu.nl
Arntz
Arnoud
A
van den Hout
Marcel A
MA
D000328:Adult; D001008:Anxiety Disorders / Q000175:diagnosis; D016022:Case-Control Studies; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D009426:Netherlands; D010555:Personality Inventory; D011594:Psychometrics; D012680:Sensitivity and Specificity; D013313:Stress Disorders, Post-Traumatic / Q000175:diagnosis*