Randomised controlled trial of cervical radiofrequency lesions as a treatment for cervicogenic headache [ISRCTN07444684]

Table 2 Randomisation and follow-up of the study patients

	T0 Step I	T1 (= 8 weeks) Step II			T2 (= 16 weeks) Step III
Patient number	Randomization	GPE	VAS success	Follow-up treatment	GPE	VAS success	TENS
1	GON	0	_	GON	-1	_	Yes, -
2	PFD C3–C6	0	_	Patient does not want follow-up treatment	Missing	+	No
3	GON	+2	_	No	0, again GON	_	No
4	PFD C3–C6	+1	+	Prog C2, prog C3 Policy: RF C2	Missing	+	No
5	PFD C3–C6	-1	+	Patient does not want follow-up treatment	OS	OS	OS
6	GON	-1	+	GON	1	+	No
7	GON	0	+	Heart catheterization, no follow-up treatment	2	_	No
8	PFD C3–C6	+2	_	No	1	+	No
9	PFD C3–C6	0	_	Progn. C2, C3, C5: all no effect	0	+	Yes, -
10	GON	+1	+	GON	2	_	Yes, +
11	PFD C3–C6	+1	+	Prog C2, prog C3 Policy: RF C2	1	+	Yes, +
12	GON	+2	+	No	2	+	No
13	PFD C3–C6	-2	_	Yes, but patient had no time to come anymore	OS	OS	OS
14	PFD C3–C6	+2	_	No	2	Missing	No
15	GON	+3	Missing	No	2	_	No
16	GON	+1	+	GON	0	+	Yes, +
17	GON	-2	_	GON	1	Missing	Yes, +
18	GON	0	+	PFD C3-C6	0	+	Yes, -
19	PFD C3–C6	-2	+	OS, not very content with the treatment	OS	OS	OS
20	PFD C3–C6	+2	+	No	-2	_	Yes, +
21	GON	+2	+	No	2	+	No
22	PFD C3–C6	0	+	Progn. C2, progn. C3: all no effect	1	+	Yes, -
23	PFD C3–C6	+2	+	No	2	+	No
24	GON	+1	+	GON	0	_	Yes, OS
25	PFD C3–C6	0	+	Progn. C2, C3, C4: all no effect	0	+	Yes, -
26	GON	OS	Missing	OS	OS	Missing	OS
27	PFD C3–C6	0	+	Progn. C2, C3. Policy: RF C3	+1	+	Yes, -
28	GON	+1	_	GON	-2	_	Yes, +
29	GON	-2	_	OS, does not want any treatment	OS	OS	OS
30	PFD C3–C6	0	+	Progn. C2, C3: all no effect	-2	_	Yes, +

GON = Greater Occipital Nerve
PFD = Percutaneous Facet Denervation
GPE = Global Perceived Effect (-3 = much worse, -2 = worse, -1 = little worse, 0 = no effect, +1 = improved, +2 = much improved, +3 = no complaints anymore)
VAS = Visual Analogue Score (+ = success, - = no success)
OS = Off Study
TENS = Transcutaneous Electrical Nerve Stimulation (+ = success, - = no success)

ISSN: 1471-2253