Table. 3.

Univariate logistic regression of the technical factors associated with treatment outcomes for genicular radiofrequency denervation

Variable Positive outcome (n = 131) Negative outcome (n = 75) OR (95% CI) P value
Prognostic block
Yes
No

106 (80.9)
25 (19.1)

46 (61.3)
29 (38.7)

2.673 (1.414, 5.050)
1 (Ref)

0.002*
Targeted nerves
3 nerves
5 nerves

87 (66.4)
44 (33.6)

68 (90.7)
7 (9.3)

1 (Ref)
4.91 (2.082, 11.590)

< 0.001*
Lesion time (sec)
≥ 90
< 90

105 (80.2)
26 (19.8)

54 (72.0)
21 (28.0)

1.57 (0.810, 3.050)
1 (Ref)

0.181
Sedation
Yes
No

63
68

30
45

1.39 (0.782, 2.470)
1 (Ref)

0.262

Values are presented as number (%) or number only.

Positive outcome was described as 50% or more reduction of NRS lasting at least 6 months. Negative outcome defines as < 50% pain relief or not lasting for 6 months.

P value compares positive outcome vs. negative outcome.

Three nerves consisted of superomedial, superolateral and inferomedial genicular nerves. Five nerves consisted of superomedial, superolateral and inferomedial genicular nerves, infrapatellar branch of the saphenous nerve and recurrent fibular nerve.

OR: odds ratio, CI: confidence interval, Ref: reference.

*If P < 0.05, it was considered statistically significant.

Korean J Pain 2022;35:447~457 https://doi.org/10.3344/kjp.2022.35.4.447
© Korean J Pain