Table 3. Correlations between health-related quality of life metrics and radiographic improvement.
| HRQL improvement | Ames modifier improvements | SRS-Schwab modifier improvements | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| cSVA | TS-CL | Horizontal gaze | SVA | PT | PI-LL | ||||||||||||
| r | P | r | P | r | P | r | P | r | P | r | P | ||||||
| mJOA improve | 0.02 | 0.89 | −0.14 | 0.27 | 0.12 | 0.35 | 0.13 | 0.32 | −0.12 | 0.33 | 0.13 | 0.32 | |||||
| EQ5D improve | −0.03 | 0.84 | 0.14 | 0.29 | 0.07 | 0.58 | 0.08 | 0.54 | 0.02 | 0.90 | 0.08 | 0.54 | |||||
| NDI improve | 0.03 | 0.80 | −0.01 | 0.92 | 0.00 | 1.00 | 0.03 | 0.82 | −0.05 | 0.69 | 0.03 | 0.82 | |||||
| mJOA MCID | 0.12 | 0.34 | −0.10 | 0.44 | 0.13 | 0.31 | 0.30 | 0.017* | −0.03 | 0.82 | 0.06 | 0.65 | |||||
| EQ5D MCID | −0.14 | 0.26 | 0.01 | 0.93 | 0.03 | 0.80 | 0.18 | 0.16 | 0.28* | 0.027* | 0.30 | 0.017* | |||||
| NDI MCID | −0.03 | 0.81 | 0.14 | 0.29 | 0.06 | 0.64 | 0.23 | 0.06* | −0.05 | 0.69 | 0.03 | 0.81 | |||||
*, represent a significance of P<0.05. NDI, neck disability index; EQ-5D, EuroQol five dimensions; mJOA, modified Japanese Orthopaedic Association; MCID, minimum clinically important difference; cSVA, cervical sagittal vertical axis; TS-CL, T1 slope minus cervical lordosis; SVA, sagittal vertical axis; PT, pelvic tilt; PI-LL, pelvic incidence minus lumbar lordosis.