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Table 4 Comparison of ODI between Group T and Group TR without further surgery at different time

From: Transforaminal epidural steroid injection combined with radio frequency for the treatment of lumbar disc herniation: a 2-year follow-up

Group Pre-operation Post-operation
1 month 3 months 6 months 12 months 24 months
Group T (n = 72) 69.45 ± 6.71 14.90 ± 3.90a 16.12 ± 4.39a 26.12 ± 6.05a 26.11 ± 8.92a 27.77 ± 8.46a
Group TR (n = 95) 70.76 ± 6.68 15.27 ± 3.86a 15.54 ± 5.37a 15.68 ± 4.61ab 19.19 ± 6.34ab 20.91 ± 7.20ab
Time F, P 1825.276, < 0.001
Group F, P 94.292, < 0.001
Time * Group F, P 33.229, < 0.001
  1. Notes: Patients who received open surgery during the 2-year study period were deleted. Data are presented as mean ± SD. The groups were compared by repeated measures analysis of variance (ANOVA). Bonferroni correction was used to correct multiple comparisons. Group T: TFESI group; Group TF: TFESI combined with RF group; vs pre-operation in the same group, aP < 0.05; vs Group T in the same time, bP < 0.05
  2. Abbreviations: ODI Oswestry Disability Index, TFESI transforaminal epidural steroid injection, RF radio frequency