A cluster of high psychological and somatic symptoms in children with idiopathic scoliosis predicts persistent pain and analgesic use 1 year after spine fusion.

BACKGROUND

Persistent postoperative pain is a significant problem for many children, particularly for those undergoing major surgery such as posterior spine fusion. More than two-thirds report persistent pain after spine fusion, yet factors that may contribute to poorer outcomes remain poorly understood.

OBJECTIVE

This prospective, longitudinal study examined how psychologic and somatic symptoms cluster together in children aged 10-17 years with idiopathic scoliosis, and tested the hypothesis that a higher psychological and somatic symptom cluster would predict worse pain outcomes 1 year after fusion.

METHODS

Otherwise healthy children with idiopathic scoliosis completed preoperative surveys measuring recent pain intensity, pain location(s), somatic symptom severity, painDETECT (neuropathic-type pain symptoms), pain interference, fatigue, depression, anxiety, and pain catastrophizing. Pain outcome data were collected during hospitalization, and at 1 year after surgery.

RESULTS

Ninety-five children completed baseline surveys and a cluster analysis differentiated 28 (30%) with a high symptom profile that included; higher depression, fatigue, pain interference, catastrophizing, and painDETECT scores. High symptom cluster membership independently predicted higher pain interference at 1 year (β 9.92 [95% CI 6.63, 13.2], P < 0.001). Furthermore, children in this high symptom cluster reported significantly higher pain intensity and painDETECT scores, and had a 50% higher probability of continued analgesic use at 1 year compared to those in the Low Symptom Cluster (95% CI 21.3-78.5, P = 0.001).

CONCLUSIONS

Findings from this exploratory study suggest a need to comprehensively assess children with scoliosis for preoperative signs and symptoms that may indicate an underlying vulnerability for persistent pain. This, in turn may help guide a comprehensive perioperative treatment strategy to mitigate the potential for long-term pain trajectories.