185   Long-term Follow-up in Functional Outcomes of Combined Supraorbital Nerve Stimulation and Occipital Nerve Stimulation for Chronic Headache XXXX .

@entity1 @entity2704 @entity10 @entity158
INTRODUCTION: Dual supraorbital and occipital nerve stimulation (SONS and ONS) have shown promising efficacy in treating @entity10 . However, its functional outcome is not well studied. We report functional outcome of combined SONS and ONS for @entity2704 using verified metrics. METHODS: Consecutive @entity1 who have both supraorbital and occipital nerve stimulators and also underwent @entity2704 Disability Assessment (MIDAS) and Beck Depression Index (BDI) both pre- and postoperatively were studied. Outcome variables included net improvement of ranked MIDAS and BDI scores. Predictor variables included @entity1 with 50% improvement of @entity158 , disability status, number of years from diagnosis to implantation, and narcotic use. Multivariate analysis of variance (MANOVA) was performed to assess the correlation between the outcome and predictor variables. RESULTS: Sixteen @entity1 (12 female; age average 51.8 years) were studied. Follow-up ranged from 5 to 80 months (average 44.5    21.4 months). Eight had a positive response (50% improvement in @entity10 ) at most recent follow-up. Fifty percent improvement in @entity10 was the only predictor of outcome variables combined (total MIDAS, MIDAS-B, and BDI) (P = .021). Of note, this improvement in functional outcome was only significant during the perioperative period and not throughout the length of follow-up. No other predictive factors were significantly correlated with the functional outcomes. Among the predictor variables, a strong correlation was found for disability status being inversely related to reporting 50% improvement in @entity10 (r = -0.582). CONCLUSION: In @entity1 who had positive response to SONS and ONS, functional status as reflected by MIDAS and BDI had overall improvement in perioperative period. Unfortunately, this effect waned over the long-term follow-up.
