Effect of diet, exercise and sleep on tic severity: a scoping review protocol

INTRODUCTION: Tourette syndrome is a common childhood-onset neuropsychiatric disorder, with tics that wax and wane in frequency and severity over time. The purpose of the proposed scoping review is to map the types of evidence available pertaining to the effect of diet, sleep and exercise on tic severity and identify key concepts and gaps in research. METHODS: Our scoping review will use the six-step framework recommended by Arksey and O’Malley, with enhancements from Levac et al and Joanna Briggs Institute. We will attempt to identify all the relevant literature regardless of study design. We will search six electronic databases, the reference lists of all selected studies and the grey literature for studies examining an association between dietary factors, sleep or physical exercise and tics, or studies of interventions targeting diet, sleep or exercise to reduce tics. Our analysis plan includes description of the reported associations among dietary factors, sleep and physical exercise and tics, the effects of interventions, the research methodologies and how outcomes are measured. ETHICS AND DISSEMINATION: An approval from a recognised committee is not required to conduct the proposed review, as the study entails secondary analysis of the literature available publicly. For dissemination of the study, the results will be submitted for publication to peer-reviewed scientific journals and presented at relevant public forums and conferences.