Primary outcome measures | Data collection instruments |
 Postural stability | A swaymeter |
- Sway displacement | Â |
- Sway area | Â |
 Cervical joint position error | A laser-pointer attached to a lightweight headband |
Secondary outcome measures | |
 Gait speed | 10-m walk test |
  Dizziness intensity | VAS (0-100 mm) |
 Neck pain intensity | VAS (0-100 mm) |
 Neck disability | NDI-TH (0-100) |
 Pain extent and location | iPad and custom software |
 Cervical range of motion | A CROM instrument |
 Functional ability status | PFSF (scale range 0-10) |
 Health-related quality of life | Thai SF-36 (scale range 0-100) |
 Global perceived benefit of treatment | A seven-point ordinal Likert scale (1-7) |