A short version of the Pain Anxiety Symptoms Scale (PASS-20): Preliminary development and validity
LM McCracken | L Dhingra
Research has shown significant relations between fear
and avoidance of pain and the suffering and disability
of chronic pain. Effective measurement tools have formed
the foundation for studying these relations.
The present article describes the initial development
and validation of the PASS-20, a short form version
of the Pain Anxiety Symptoms Scale (PASS). Like the
original inventory, the PASS-20 measures fear and anxiety
responses specific to pain. Items were selected for
the short version based on item variance, item intercorrelation
and reliability analyses.
The PASS-20 shows strong internal consistency, reliability,
and good predictive and construct validity. Item reduction
appears to result in minimal shrinkage of validity correlations.
Overall, the results suggest that the short form retains
adequate psychometric properties. Possible research
and clinical implications for the PASS-20 include more
efficient screening during evaluations of patients with
chronic pain, and use when the time or effort needed
for the full version is prohibitive.