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Table 2 Mean pre-op, post-op and final FU values, in all 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% (57–141)

43,6%(0–149)

58,8%(5–154)

Lumbar-sacral angle (LSA)

−19,5° (− 47 to + 17)

−6,6° (− 58 to + 15)

−12,3° (− 47 to + 15)

Lumbar lordosis (LL)

57,8° (29–72)

56,4° (40–72)

55,1° (38–71)

Sacral slope (SS)

43,9° (20–59)

45,9° (18–57)

43,9° (19–60)

Pelvic tilt (PT)

28,2° (17–41)

25,6° (11–45)

28,8° (14–49)

Pelvic incidence (PI)

72,8° (49–88)

72,1° (51–88)

73,1° (41–89)