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Table 2 Randomisation and follow-up of the study patients

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

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