Long-term efficacy with deep brain stimulation of the globus pallidus internus in cervical dystonia: a retrospective monocentric study.

Comparing individual subitems of the TWSTRS severity score, we (C) showed significant improvement in torticollis (− 56%, p = 0.021) and displayed a favorable trend for the range of voluntary rotational head movement (− 60%, p = 0.05).

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For example, considering the different TWSTRS subitems, we found particularly a positive effect on torticollis and a statistical trend for improvement of the range of voluntary rotational head movement (p = 0.05).

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The range of voluntary head motion showed a trend (p = 0.05) to an improvement of approximately 60% (mean difference 0.67 points).

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As shown in Table 3 , there is a good response with a reduction in AC of 16.5% (and just missed significance at p = 0.051).

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In the analysis, a clearly significant reduction was evident with regard to torticollis in the comparison of all TWSTRS subitems.

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