| Grade I neck associated disorders | No signs or symptoms suggestive of major structural pathology and no or minor interference with activities of daily living |
| Grade II neck associated disorders | No signs or symptoms of major structural pathology, but major interference with activities of daily living |
| Grade III neck associated disorders | No signs or symptoms of major structural pathology, but presence of neurologic signs such as decreased deep tendon reflexes, weakness, or sensory deficits |
| Non-specific low back pain | Non-specific low back pain is defined as low back pain not attributable to a recognisable, known specific pathology (e.g., infection, tumour, osteoporosis, fracture, structural deformity, inflammatory disorder, radicular syndrome, or cauda equina syndrome) |