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Table 2: 
Pain severity and Neck Disability Index scores for intra-articular facet and transforaminal corticosteroid injections
VariableGroups
IFSITFSI
Subjects (No.)
    It2828
    At2927
VAS% (mean) (95% CI)
    It45.3 (21.4–69.2)9.8 (+11.5–31.2)
    At37.0 (9.2–64.7)17.8 (+6.6–42.2)
NDI% (mean) (95% CI)
    It24.3 (+2.9–51.5)9.6 (+15.2–34.4)
    At20.7 (+6.2–47.6)12.8 (+11.2–36.7)
  • Note:—VAS% indicates the relative difference between postintervention and baseline VAS pain scores; NDI%, the relative difference between postintervention and baseline Neck Disability Index scores; It, intention-to-treat analysis; At, as-treated analysis.