Table 1.

Comparison evaluation of pre-treatment^* and post-treatment^* clinical findings

Measurement	Normal	Pre-treatment Mean	Post-treatment Mean	Mean Difference
ARA C2–C7 (°)	−42.0	−15.5 ± 15.8	−22.1 ± 13.5	6.6
Tz C2–C7 (mm)	0.0	15.1 ± 13.9	11.8 ± 8.4	3.3
Tz DCS (mm)	0.0	3.1 ± 0.9	0.5 ± 0.4	2.6
Tz SCD at DCS (mm)	17.0	14.8 ± 0.6	17.0 ± 0.8	2.2
NDI (%)	0.0	34.5 ± 5.7	4.3 ± 1.2	30.2

^*Treatment is 30 sessions of Mirror Image® spinal exercises, adjustments, and traction over 12 weeks per Chiropractic BioPhysics® protocols explained in the subsection, Interventions and Outcomes, of the Case Descriptions section.

ARA = Absolute Rotational Angle of Measurement

Tz = Translation in the z-axis/sagittal plane

DCS = Degenerative Cervical Spondylolisthesis

SCD = Spinal Canal Diameter

NDI = Neck Disability Index

Xray 1 = Pre-treatment values

Xray 2 = Post-treatment values following 30 sessions over 12 weeks

Description: Table 1 shows mean values of eight patients for absolute rotational angle from C2 to C7, translations in the z-axis (Tz) of the cervical region from C2–C7 and per degenerative cervical spondylolisthesis segments, and neck disability index scores of pre-treatment and post-treatment assessments. Mean ARA C2–C7 improved from −15.5° to −22.1° (normal is −42.0°); mean Tz C2–C7 improved from 28.0 mm to 11.8 mm (normal is 0.0 mm); mean Tz DCS improved from 3.1 mm to 0.9 mm (normal is < 1.0 mm); mean Tz SCD at DCS improved from 14.8 mm to 17.0 mm (normal is 17 mm); and mean NDI improved from 34.5% to 4.3% (normal is 0%). All measurements improved toward normal values.