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Does a high pre-operative Pain Catastrophisation Score influence the outcomes following hallux surgery

R. Critchley, L. Dismore, K. Swainston, D. Townshend, J. Coorsh, R. Kakwani, A. Murty

Background: Surgical intervention for hallux valgus and hallux rigidus is an option for patients presenting with severe pain and deformity. Literature suggest that patients with high Pain Catastrophisation Scores (PCS) have poorer outcomes in spinal and to a lesser extent in arthroplasty surgery. There is however very little evidence pertaining to foot and ankle surgery.

Aim: We aimed to study whether catastrophisation as measured by PCS influenced the outcomes following surgery for Hallux valgus and rigidus.

Methodology: Ethical approval for this prospective portfolio study was obtained from NRES Committee South Central and Oxford. Approval was granted from the local R&D department prior to data collection. All patients listed for surgery for hallux pathology to the four senior authors were invited to participate. Recruitment into the study started in September 2017 and is ongoing. Pain catastrophising score (PCS), Manchester Oxford Foot Questionnaire (Mox-FQ), Visual analog scale (VAS) for pain and EQ-5D-3L questionnaires were completed Pre-op (baseline), and at 3, 6 and 12- months post-surgery.

Results: 93 patients with minimum follow-up of 6 months were analysed using SPSS software. A P-value of less than 0.05 was considered significant. The mean age of the patients was 58.5 years and 83% were women. 70% of the patients had surgery for hallux valgus and rest for rigidus. Both PROMS and PCS improved significantly following surgical intervention. Patients with higher pre-operative PCS had a worse 6-month PROM score and more pain.  

Conclusion: This study confirms that pre-operative catastrophisation as demonstrated by a high PCS score has an adverse effect on outcomes following hallux surgery.
Risk stratifying patients based on their Pre-op PCS scores may be a useful strategy to identify those at risk of poorer outcomes. We recommend that behavioural change interventions should be considered to try to improve outcomes in patients with pre-op PCS.

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