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Table 1 Comparison of general data between Group T and Group TR

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

  Group T (n = 110) Group TR (n = 120) t/ (x2) P
Male/female 47/63 53/67 (0.048) 0.826
Age (years) 64.70 ± 14.23 65.54 ± 16.06 −0.419 0.675
BMI (kg/m2) 24.48 ± 5.05 24.43 ± 5.20 0.077 0.939
Disc herniation classification Protrusion 62 66 (0.043) 0.835
Extrusion 48 54
Hospitalization time (days) 5.39 ± 1.24 5.88 ± 2.43 −1.907 0.058
Operation time (min) 29.02 ± 7.49 63.42 ± 9.79 −30.092 < 0.001*
Complication 2 (1.82%) 6 (5%) (0.913) 0.339
Recurrence 60 (54.55%) 41 (34.17%) (9.677) 0.002*
  1. Notes: Numeric data were expressed as Mean ± SD and analyzed by Independent-Samples T-test. Categorical data were expressed by the number of patients (%) and were analyzed with the χ2 test. Group T: TFESI group; Group TR: TFESI combined with RF group. *P < 0.05, Group T vs Group TR
  2. Abbreviations: BMI body mass index, VAS visual analog scale, ODI Oswestry Disability Index, TFESI transforaminal epidural steroid injection, RF radio frequency