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Table 3: 
Pain severity subgroup analysis of the etiologic imaging findings for intra-articular facet and transforaminal corticosteroid injections
VariableSubgroups
Disk Herniation ± SpondylosisSpondylosis
IFSITFSIIFSITFSI
Subjects (No.)
    It1481420
    At1391618
VAS% (mean) (95% CI)
    It65.0 (31.2–98.9)8.0 (+20.2–36.2)30.1 (0.4–59.7)+1.6 (+33.7–30.4)
    At46.5 (9.4–83.6)22.7 (+6.6–51.9)23.6 (+6.7–53.9)5.6 (+27.1–38.2)
  • Note:—VAS% indicates the relative difference between postintervention and baseline VAS pain scores; It, intention-to-treat analysis; At, as-treated analysis.