Influence of neuroticism, catastrophizing, pain duration, and receipt of compensation on short-term response to nerve block treatment for chronic back pain.

This study investigated the influence of pain catastrophizing, neuroticism, pain duration, and receipt of compensation for 60 patients undergoing nerve block treatment for chronic back pain. Follow-up assessment 1 week following nerve block treatment found that neither neuroticism nor catastrophizing predicted level of reported pain or extent of disability. However, receipt of compensation and duration of pain were both associated with reduced benefit from treatment. The above four variables combined were able to account for 24% of the outcome variance in both level of pain and extent of disability. Possible causal patterns related to compensation and treatment outcome, limitations of the study, and directions for future research are discussed.