Table 2.

Data collection and outcome measures.

	Intake surgeon	Intake research nurse	Informed consent	Surgery	Follow-up 2 weeks	Follow-up 4 weeks	Follow-up 8 weeks	Follow-up 12 weeks	Follow-up 26 weeks	Follow-up 52 weeks	Follow-up 104 weeks	Follow-up 156 weeks	Follow-up 208 weeks	Follow-up 260 weeks
Visit	1	2	3	4			5		6	7	8			9
Inclusion/exclusion criteria	X
Informed consent			X
Treatment preference	X	X
Expected recovery	X	X
Demographics & diagnosis	X	X
Basic physical examination	X
Neurological examination	X	X					X			X	X	X	X	X
Randomisation				X
Dynamic X-ray	X						X			X	X	X	X	X
MRI	X										X			X
CT	X										X			X
NDI		X			X	X	X	X	X	X	X	X	X	X
McGill		X			X	X	X	X	X	X	X	X	X	X
VAS arm and neck		X			X	X	X	X	X	X	X	X	X	X
SF-36		X			X	X	X	X	X	X	X	X	X	X
HADS		X					X		X	X	X	X	X	X
Karasek		X			X	X	X	X	X	X	X	X	X	X
Likert					X	X	X	X	X	X	X	X	X	X
Macnab							X		X	X	X			X
EuroQol and VAS		X			X	X	X	X	X	X	X	X	X	X
Cost diaries								X	X	X	X	X	X	X
Complications				X			X			X	X	X	X	X
Re-operation							X			X	X	X	X	X