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Table 1 Patient baseline characteristics and psychometric properties

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

  RF (Group I) Control (Group II)
Number of patients (n) 15 15
Mean age (SD) [min/max] (yr) 47,5 (11,0) [22/62] 49,1 (12,8) [28/64]
Male/female (n) 4/11 4/11
Duration of pain (yr) 9,7 6,6
SCL-90 psychoneurotism (SD) 146,3 (29,8) 135,4 (25,0)
Mean VAS/4 weeks (SD) 68,1 (12,7) 76,5 (16,6)
Days headache/4 weeks (SD) 25,9 (5,0) 19,0 (9,3)
Medicine use/week (SD) 6,7 (5,0) 5,8 (8,3)
Headache intensity/week (SD) 2,1 (0,4) 1,9 (0,4)
Rand-36 (SD):   
PF 70,0 (21,4) 57,0 (24,6)
SF 71,7 (18,0) 59,2 (23,4)
RP 31,7 (34,7) 36,7 (35,2)
RE 64,4 (38,8) 66,7 (35,6)
MH 65,3 (16,2) 69,6 (16,8)
VI 53,7 (24,3) 45,3 (15,2)
BP 41,8 (19,4) 38,1 (18,5)
GH 58,7 (21,0) 54,7 (18,5)
MPI (SD):   
Pain severity 45,6 (9,6) 36,8 (13,6)
Interference 42,0 (14,1) 44,6 (15,9)
Life control 55,0 (8,4) 58,0 (9,2)
Affective distress 48,0 (9,6) 41,9 (9,8)
Support 52,5 (9,8) 51,8 (8,6)
Punishing responses 48,1 (9,5) 45,5 (7,1)
Solicitous responses 53,3 (10,8) 51,3 (10,4)
Distracting responses 50,4 (13,2) 46,5 (9,4)
Household chores 48,4 (9,9) 48,5 (11,1)
Outdoor work 53,5 (9,4) 56,5 (15,9)
Social activities 54,4 (12,0) 52,7 (12,0)
General activity 52,8 (12,0) 53,9 (12,0)