Pre- to Postoperative differences in lower extremity compensatory mechanisms (SFA, KA, AA, PS, GSA) for overall, worsened (increase in TS-CL and cSVA), and improved (decrease in TS-CL and cSVA) CD cohorts.
| Compensatory Mechanism and Cohort | Preoperative | Postoperative | P |
| TK | |||
| Overall | –42.1 | –43 | 0.535 |
| Worsen | –41.1 | –45.3 | 0.106 |
| Improve | –42.7 | –41.4 | 0.415 |
| SFA | |||
| Overall | 199.6 | 195.6 | 0.286 |
| Worsen | 197.5 | 196.4 | 0.225 |
| Improve | 199.8 | 194.6 | 0.36 |
| KA | |||
| Overall | 2.7 | –1 | 0.27 |
| Worsen | 3.1 | 2.8 | 0.691 |
| Improve | 2.6 | –2.4 | 0.33 |
| AA | |||
| Overall | 6.1 | 5.5 | 0.036a |
| Worsen | 5.9 | 5.4 | 0.161 |
| Improve | 6.1 | 5.6 | 0.19 |
| PS | |||
| Overall | 20.9 | 21.9 | 0.742 |
| Worsen | 22.7 | 23.1 | 0.921 |
| Improve | 21.9 | 24.7 | 0.55 |
| GSA | |||
| Overall | 1 | 2.8 | 0.261 |
| Worsen | 0.79 | 1 | 0.593 |
| Improve | 1.2 | 4 | 0.258 |
↵a Statistically significant.
AA, ankle angle; CD, cervical deformity; cSVA, cervical sagittal vertical angle; GSA, global sagittal angle; KA, knee angle; PS, pelvic shift; SFA, sacrofemoral angle; TK, thoracic kyphosis; TS-CL, T1 slope minus cervical lordosis.