Table. 4.

Multivariate logistic regression of the factors associated with positive outcomes for genicular radiofrequency denervation (r2 = 40.2%)

Variable OR 95% CI P value
Prior knee surgery 0.493 0.238, 1.021 0.057
None prior surgery 1 (Ref)
Degree of degeneration
KL ≤ 2 0.600 0.304, 1.182 0.140
KL > 2 1 (Ref)
Targeted nerves
3 nerves 1 (Ref) 2.291, 16.690 < 0.001*
5 nerves 6.184
Opioid use 1 (Ref)
No opioid use 2.753 1.405, 5.393 0.003*
Prognostic block
Yes 2.109 1.038, 4.287 0.039*
No 1 (Ref)
Lesion time (sec)
≥ 90 1.017 0.471, 2.199 0.965
< 90 1 (Ref)
Baseline NRS score 0.920 0.685, 1.236 0.580
Depression 0.297 0.124, 0.713 0.007*
No depression 1 (Ref)

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, KL: Kellegren–Lawrence, NRS: numerical rating scale, 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