Out of 162 enquiries, 24 participants were screened as eligible and randomised to either the chiropractic (n =13) or sham (n = 11) intervention group. Compliance was satisfactory with only two participants lost to follow up; thus, postintervention data for 12 chiropractic intervention and 10 sham intervention participants were analysed. Blinding was similar between groups. Mild harms of increased spinal pain or headaches were reported by 6 participants. Costs amounted to AUD$2635 per participant. The data showed a trend favouring the chiropractic group in terms of clinicallysignificant improvements in both NDI and DHI scores. Sample sizes of n = 150 or n = 222 for dizziness or neck pain disability as the primary outcome measure, respectively, would be needed for a fully powered trial.