A 13 item questionnaire scoring from 0 (not at all) to 4 (all the time). The scale assesses the degree to which a person has thoughts and feelings when they are experiencing pain. Higher scores indicate higher levels of pain-related anxiety.
Ensure you cite the author(s).
Sullivan, M. J. L., Bishop, S. R., & Pivik, J. (1995). The Pain Catastrophizing Scale: Development and validation. Psychological Assessment, 7(4), 524–532. https://doi.org/10.1037/1040-35188.8.131.524
The above is not necessarily APA formatted.