The Effect of Psychological Factors on the Outcomes of Carpal Tunnel Release: A Systematic Review.

BACKGROUND: Several studies report that psychological factors are associated with outcomes of carpal tunnel release. However, interpretation of the association is difficult as there are diverse outcome parameters and patient expectations are different. We performed a systematic review to assess the relationships between psychological factors and the various outcome parameters.

METHODS: We identified 611 papers and selected 8 papers that fit the inclusion criteria. Psychological factors assessed were anxiety, depression, pain catastrophizing, coping, and mental health status. Outcomes of interest included satisfaction and measures of perceived level of function, pain, and physical measures of recovery.

RESULTS: For satisfaction and perceived level of function as the outcome, three studies reported a significant association, one study found an association approaching a value of significance, and one study reported no association. For pain as the outcome, two studies reported a significant association. For physical measures, one study reported no association.

CONCLUSIONS: This systematic review found that depression correlates with postoperative pain, but that the association is less clear between psychological factors and outcomes such as satisfaction, perceived level of symptom and function, and physical measures of recovery. As pain may not be a primary symptom or outcome of CTS, we consider that the current literature does not strongly support the association between psychological factors and outcomes of CTR. This review could be of benefit during preoperative counseling in patients with psychological disturbances.