ArticleClinical parkinsonism & related disorders2025
Longitudinal Analysis of the Deep Brain Stimulation Impairment Scale for Subthalamic Nucleus Stimulation in Parkinson's Disease.
Article in Clinical parkinsonism & related disorders, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Deep brain stimulation (DBS) of the subthalamic nucleus (STN) is an established treatment for people with Parkinson's disease (PwP). However, some patients treated with DBS may still experience quality of life limiting impairments after surgery, e.g., concerning posture and gait, cognition, speech, apathy or impulsivity, as well as technical challenges in managing the implanted device. The Deep Brain Stimulation Impairment Scale (DBS-IS) was developed to assess these impairments, yet their postoperative development is underexplored. Methods: We retrospectively analysed changes in the DBS-IS Total Score and subscales assessed in patients at baseline, three, six and twelve months post-DBS implantation (n = 33 PwP) using linear mixed models for repeated measurements. Furthermore, we investigated device-related issues within the first year after surgery and their impact on quality of life in a larger sample (n = 99 PwP) using DBS-IS Facility Scores. Results: After surgery we observed significant improvement in the DBS-IS Total Score (β = -1.93; p = 0.005), particularly in the subscales of postural instability, gait difficulty and cognitive impairment. 43 % of patients reported device-related problems within one year after surgery. Patients with device-related problems showed significantly less improvement in quality of life (z = -2.40; p = 0.017). Exploratory post-hoc tests suggested a higher propensity for device-related complications among older individuals (z = -2.19; p = 0.029). Conclusion: The majority of impairments evaluated by the DBS-IS, such as postural instability, gait difficulty and cognitive impairments, appear amenable to STN-DBS intervention. Special attention is warranted for potential device issues, especially in older patients, to optimize patients' quality of life outcomes.
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