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Table 4 Mean values ( ± standard deviation) of Spinopelvic parameters in the two study groups based on changes in pelvic tilt after spinal fusion

From: The impact of sagittal balance on clinical results after posterior interbody fusion for patients with degenerative spondylolisthesis: A Pilot study

Variable
(normal range*)
Pelvic tilt(°)
(12-18)
Sacral slope (°)
(36-42)
Pelvic incidence(°)
(48-55)
Group Preop Postop Last FU Preop Postop Last FU Preop Postop Last FU
A
(n = 10)
21.5 ± 5.0 24.3 ± 5.1 25.1 ± 6.2 31.2 ± 8.8 27.9 ± 8.7 28.9 ± 9.8 52.7 ± 7.9 52.2 ± 6.7 53.7 ± 7.0
B
(n = 8)
26.4 ± 4.2 24.5 ± 4.7 18.4 ± 3.6 29.1 ± 62 29.2 ± 7.1 36.7 ± 6.5 55.5 ± 6.3 55.0 ± 8.0 55.1 ± 7.7
p value 0.06 ns 0.01 ns ns 0.09 ns ns ns
Variable
(normal range*)
Thoracic kyphosis(°)
(41-48)
Lumbar lordosis(°)
(43-61)
SC7D/SFD
(-1.9-0.1)
Group Preop Postop Last FU Preop Postop Last FU Preop Postop Last FU
A
(n = 10)
38.4 ± 9.7 36.4 ± 8.8 33.7 ± 10.0 46.5 ± 9.3 45.0 ± 9.9 48.1 ± 10.9 0.81 ± 0.9 0.82 ± 0.4 0.50 ± 0.6
B
(n = 8)
35.2 ± 8.9 37.1 ± 8.9 41.3 ± 9.6 38.4 ± 8.1 39.9 ± 10.8 47.4 ± 7.5 0.74 ± 0.4 0.11 ± 0.4 0.27 ± 0.4
p value ns ns ns 0.09 ns ns ns 0.04 ns
  1. SC7D = sacro-C7 plume line distance; SFD = sacro-femoral distance
  2. *Values are means from studies that included adult subjects aged 20 to 85 years without any symptom or history suggestive of spinal disease [5, 7, 2233].
  3. †p < 0.05; Statistical significance of value between preoperative and last follow up was determined using Wilcoxon's signed rank test.
  4. p < 0.05; Statistical significance of value between group A and B was determined using Mann-Whitney U test.