Primary cervical dystonia and scoliosis: a multicenter case-control study

Area of Science:

• Neurology
• Orthopedics
• Medical Genetics

Background:

• Cervical dystonia (CD) is a primary adult-onset movement disorder.
• The etiology of CD remains incompletely understood.
• Scoliosis is a common spinal deformity with various potential causes.

Purpose of the Study:

• To investigate the prevalence of prior scoliosis in adult-onset cervical dystonia patients.
• To determine if a history of scoliosis is associated with an increased risk of developing CD.
• To explore the relationship between scoliosis, family history of dystonia, and CD.

Main Methods:

• A case-control study involving 72 patients with primary adult-onset CD and 144 matched controls.
• Data collected via standardized questionnaires and medical records, focusing on prior scoliosis, other spine diseases, and family history.
• Conditional logistic regression used to adjust for confounding factors like age, disease duration, and education level.

Main Results:

• Prior scoliosis, particularly that developing in childhood or puberty, was significantly more frequent in CD patients compared to controls.
• An adjusted odds ratio of 6.8 indicated a substantially increased risk of CD associated with prior scoliosis.
• Family history of dystonia showed a strong association with CD, which was attenuated after controlling for scoliosis.

Conclusions:

• Prior scoliosis appears to be a potential risk factor for developing adult-onset cervical dystonia.
• The findings suggest an interconnectedness between scoliosis and dystonia, possibly indicating shared underlying mechanisms or pathways.
• Scoliosis may play a role in the manifestation or progression of dystonia.