TABLE 1.

Preoperation patients’ characteristics in A and B group.

Parameters	Group
	A	B
Patients (n)	25	25
Gender (F/M,%)	13 (52.0%)/12 (48.0%)	14 (56.0%)/11 (44.0%)
Age (years, range)	55.26 ± 8.47 (42–68)	54.35 ± 8.32 (44–67)
Preoperation pain duration (M, range)	8.67 ± 4.23 (3–16)	8.58 ± 4.34 (4–17)
Pain side (n,%)
Right	15 (60.0%)	16 (64.0%)
Left	10 (40.0%)	9 (36.0%)
Preoperation VAS	7.65 ± 1.43	7.47 ± 1.52
Preoperation analgesics dosage
Carbamazepine (mg/d, n)	536.15 ± 76.24 (5)	542.21 ± 77.12 (6)
Gabapentin (g/d, n)	2.31 ± 0.42 (12)	2.29 ± 0.54 (11)
Pregabalin (mg/d, n)	417.48 ± 69.38 (8)	421.51 ± 71.45 (8)
Preoperation narcotic analgesics dosage
Oxycontin (mg/day, n)	43.65 ± 11.34 (25)	43.79 ± 10.71 (25)

A = cervical nerve root block, B = cervical nerve root pulse radiofrequency, VAS, visual analog scale. Data are presented as numbers (%) of patients or mean ± SD.