Table 1.

Inclusion – and exclusion criteria

Inclusion	Exclusion
Age: 18 – 55 years	Symptoms and/or signs of myelopathy
Cervical monoradicular symptoms	Previous cervical surgery
MRI: herniated cervical intervertebral disc and/or osteophyte in accordance with clinical symptoms and signs	Psychiatric or mental disease
Involved level not fused	Involvement of liability procedure
	Alcoholism (drinking more than 5 units)
	Insufficient of the Dutch language
	Participation in another study
	Two or more levels involved