Abstract
Background and Objectives: Despite the established association between greater pain catastrophizing and enhanced postoperative pain, it is still unclear: (i) what is the relative contribution of each of the pain catastrophizing scale (PCS) dimensions in the prediction of acute and chronic postoperative pain; and (ii) whether PCS scores mediate the association between acute and chronic postoperative pain intensity. Methods: The current prospective, observational study was conducted at Rambam Health Care Campus, Haifa, Israel. PCS was obtained in 48 pain-free patients a day before an elective thoracotomy in response to tonic heat pain. Acute postthoracotomy pain (APTP) was assessed during rest, including general pain (Restgeneral), and incision-related pain (Restincision), and in response to provoked physical activity, including hand elevation (Provokedhand) and cough (Provokedcough). Chronic postthoracotomy pain (CPTP) was assessed after 4.5±2.3 months. Results: Of the PCS subscales, only rumination: (i) was correlated with Restgeneral scores (r=0.337, P=0.027); and (ii) predicted chronic postthoracotomy pain in a regression analysis (P=0.001). General PCS and its subscales mediated the correlation between Restgeneral and chronic postthoracotomy pain intensity (Ps<0.006). Conclusions: Findings may elucidate the unique role of the rumination subscale in reflecting an individual's postopertive acute and chronic pain responsiveness. The transition from acute to chronic postoperative pain seems to be facilitated by enhanced pain catastrophizing.
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