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Table 4 Mean pre-op, postop and FU values of “unbalanced” group patients

From: High grade isthmic spondylolisthesis; can reduction always re-align the unbalanced pelvis?

X-Ray index Pre-op Post-op FU
Listhesis percentage 81% (63–141) 45,6% (4–149) 62,5% (19–154)
Lumbar-sacral angle (LSA) −22° (− 58 to + 15) −9,1° (− 58 to + 15) − 15,4° (− 47 to + 11)
Lumbar lordosis (LL) 54,53° (68–29) 53° (40–63) 50,7° (38–65)
Sacral slope (SS) 40° (20–58) 44° (19–53) 41,6° (19–60)
Pelvic tilt (PT) 29,4° (17–41) 24,1° (13–45) 30,8° (15–49)
Pelvic incidence (PI) 71,9° (49–88) 71,6° (51–87) 72,7° (41–89)