Table 1.

Participant timeline schedule

Table	Visit plan and case report forms
	Intake	Surgery (t0)	1–2 day(s) following surgery	FU 3 weeks	FU 6 weeks	FU 3 months	FU 6 months	FU 12 months	FU 18 months	FU 24 months	FU 36 months	FU 48 months
Visit surgeon	x				x
Research nurse visit	x				x			x		x		x
Randomisation		x
Surgery		x
Discharge			x
Physical examination	x				x			x		x		x
Functional X-rays	x				x					x
Roland-Morris Questionnaire	x			x	x	x	x	x		x	x	x
Oswestry Disability Index	x			x	x	x	x	x		x	x	x
NRS leg and back pain	x			x	x	x	x	x		x	x	x
Patient self-received recovery and satisfaction	x			x	x	x	x	x		x	x	x
EuroQol-5D	x			x	x	x	x	x		x	x	x
Cost questionnaires	x			x	x	x	x	x	x	x
Short form 36	x			x	x	x	x	x		x	x	x
Revisit and complications	With occurrence

FU, follow-up; NRS, Numeric Rating Scale.