Changes in patients' depression and anxiety associated with changes in patient-reported outcomes after spine surgery.

OBJECTIVE The authors conducted a study to analyze associations between changes in depression/anxiety before and 12 months after spine surgery, as well as changes in scores using the Patient-Reported Outcomes Measurement Information System (PROMIS) at the same time points. METHODS Preoperatively and 12 months postoperatively, the authors assessed PROMIS scores for depression, anxiety, pain, physical function, sleep disturbance, and satisfaction with participation in social roles among 206 patients undergoing spine surgery for deformity correction or degenerative disease. Patients were stratified according to preoperative/postoperative changes in depression and anxiety, which were categorized as persistent, improved, newly developed postoperatively, or absent. Multivariate regression was used to control for confounders and to compare changes in patient-reported outcomes (PROs). RESULTS Fifty patients (24%) had preoperative depression, which improved in 26 (52%). Ninety-four patients (46%) had preoperative anxiety, which improved in 70 (74%). Household income was the only preoperative characteristic that differed significantly between patients whose depression persisted and those whose depression improved. Compared with the no-depression group, patients with persistent depression had less improvement in all 4 domains, and patients with postoperatively developed depression had less improvement in pain, physical function, and satisfaction with social roles. Compared with the group of patients with postoperatively improved depression, patients with persistent depression had less improvement in pain and physical function, and patients with postoperatively developed depression had less improvement in pain. Compared with patients with no anxiety, those with persistent anxiety had less improvement in physical function, sleep disturbance, and satisfaction with social roles, and patients with postoperatively developed anxiety had less improvement in pain, physical function, and satisfaction with social roles. Compared with patients with postoperatively improved anxiety, patients with persistent anxiety had less improvement in pain, physical function, and satisfaction with social roles, and those with postoperatively developed anxiety had less improvement in pain, physical function, and satisfaction with social roles. All reported differences were significant at p < 0.05. CONCLUSIONS Many spine surgery patients experienced postoperative improvements in depression/anxiety. Improvements in 12-month PROs were smaller among patients with persistent or postoperatively developed depression/anxiety compared with patients who had no depression or anxiety before or after surgery and those whose depression/anxiety improved after surgery. Postoperative changes in depression/anxiety may have a greater effect than preoperative depression/anxiety on changes in PROs after spine surgery. Addressing the mental health of spine surgery patients may improve postoperative PROs. ■ CLASSIFICATION OF EVIDENCE Type of question: causation; study design: prospective cohort study; evidence: class III.