• Margaret Mordin, Catherine Masaquel, Chandra Abbott, and Catherine Copley-Merriman.
• Market Access and Outcomes Strategy, RTI Health Solutions, Ann Arbor, Michigan, USA.
• BMJ Open. 2014 Jan 1;4(10):e005150.

ObjectiveTo describe the health-related quality of life (HRQOL) burden of cervical dystonia (CD) and report on the HRQOL and patient perception of treatment benefits of abobotulinumtoxinA (Dysport).DesignThe safety and efficacy of a single injection of abobotulinumtoxinA for CD treatment were evaluated in a previously reported international, multicenter, double-blind, randomised trial. HRQOL measures were assessed in the trial and have not been previously reported.SettingMovement disorder clinics in the USA and Russia.ParticipantsPatients had to have a diagnosis of CD with symptoms for at least 18 months, as well as a total Toronto Western Spasmodic Torticollis Rating Scale (TWSTRS) score of at least 30; a Severity domain score of at least 15; and a Disability domain score of at least 3. Key exclusion criteria included treatment with botulinum toxin type A (BoNT-A) or botulinum toxin type B (BoNT-B) within 16 weeks of enrolment.InterventionsPatients were randomised to receive either 500 U abobotulinumtoxinA (n=55) or placebo (n=61).Primary And Secondary Outcome MeasuresEfficacy assessments included TWSTRS total (primary end point) and subscale scores at weeks 0, 4, 8, 12; a pain visual analogue scale at weeks 0 and 4; and HRQOL assessed by the SF-36 Health Survey (SF-36; secondary end point) at weeks 0 and 8.ResultsPatients with CD reported significantly greater impairment for all SF-36 domains relative to US norms. Patients treated with abobotulinumtoxinA reported significantly greater improvements in Physical Functioning, Role Physical, Bodily Pain, General Health and Role Emotional domains than placebo patients (p≤0.03 for all). The TWSTRS was significantly correlated with Physical Functioning, Role Physical and Bodily Pain scores, for those on active treatment.ConclusionsCD has a marked impact on HRQOL. Treatment with a single abobotulinumtoxinA injection results in significant improvement in patients' HRQOL.Trial Registration NumberThe trial is registered at ClinicalTrials.gov, numbers NCT00257660 and NCT00288509.Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.

28 keywords...

hide…