Table 4.
Linear regression by pelvic tilt and pelvic incidence-lumbar lordosis with procedure type
| Variable | Full cohort (n=188) |
PLF cohort (n=138) |
PLF + TLIF cohort (n=50) |
|||
|---|---|---|---|---|---|---|
| PT ≥20° or PI-LL ≥11° | P | PT ≥20° or PI-LL ≥11° | P | PT ≥20° or PI-LL ≥11° | P | |
| Delta ODI | ||||||
| PT | −5.17 (−12.06-1.73) | 0.144 | −7.36 (−15.23-0.52) | 0.070 | 0.51 (−15.59-16.61) | 0.951 |
| PI-LL | −0.49 (−7.46-6.47) | 0.890 | −0.17 (−8.36-8.03) | 0.968 | 3.86 (−13.32-21.03) | 0.663 |
| Delta PCS-12 | ||||||
| PT | 1.94 (−1.58-5.46) | 0.282 | 4.17 (0.05-0.83) | 0.0496* | −6.67 (−13.53-0.18) | 0.065 |
| PI-LL | −0.76 (−4.26-2.74) | 0.671 | 0.78 (−3.51-5.07) | 0.722 | −7.43 (−14.54-(−0.31)) | 0.048* |
| Delta MCS-12 | ||||||
| PT | −0.74 (−4.41-2.93) | 0.694 | 0.64 (−3.55-4.83) | 0.765 | −5.13 (−13.67-3.42) | 0.247 |
| PI-LL | 2.08 (−1.54-5.70) | 0.262 | 3.39 (−0.86-7.64) | 0.12 | −3.84 (−12.85-5.17) | 0.409 |
| Delta VAS back | ||||||
| PT | 0.04 (−1.29-1.37) | 0.95 | −0.09 (−1.54-1.37) | 0.904 | 0.07 (−3.38-3.52) | 0.969 |
| PI-LL | 0.30 (−1.07-1.66) | 0.671 | −0.27 (−1.81-1.26) | 0.729 | 2.53 (−1.17-6.23) | 0.19 |
| Delta VAS leg | ||||||
| PT | −0.20 (−1.60-1.21) | 0.784 | −0.08 (−1.67-1.51) | 0.921 | −1.67 (−4.63-1.29) | 0.278 |
| PI-LL | 0.52 (−0.91-1.95) | 0.478 | 0.70 (−0.97-2.36) | 0.413 | −0.39 (−3.72-2.93) | 0.819 |
*Statistical significance (P<0.05). Linear regression models for overall cohort, PLF only, and PLF and TLIF. PT <20° served as the reference group for PT 20° and PI-LL ≤11° served as the reference group for PI-LL ≥11°. PROMs: ODI - Oswestry Disability Index, PCS-12 - Physical component score-12, MCS-12 - Mental component score-12, VAS - Visual analogue scale, VAS back - VAS back pain, VAS leg - VAS leg pain, PT - Pelvic tilt, PI-LL - Pelvic incidence-lumbar lordosis, PLF - Posterolateral instrumented fusion, TLIF - Transforaminal lumbar interbody fusion, PROM - Patient-reported outcome measures