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Table 4 Comparison of radiographic sagittal balance parameters

From: Radiographic and clinical evidence: osteoarthritic knee can change surgical result for lumbar degenerative disease patient undergone surgery for 3-year follow-up: a retrospective comparative clinical study

  Group I Group II Comparison
  Value, mean ± S.D. P
Versus Preop
P PO#2 M Versus Ultimate PO Value, mean ± S.D. p
Versus Preop
P PO#2 M Versus Ultimate PO Pa Group 1 Versus Group 2
C7SVA (mm)
 Preop 39.2 ± 15.8    47.3 ± 9.3    0.234
 PO#1 M 23.2 ± 19.9 < 0.001*   28.3 ± 11.5 < 0.001*   0.125
 Ultimate PO 22.1 ± 14.6 < 0.001* 0.188 43.7± 5.9 0.043 < 0.001* < 0.001*
 Ultimate PO-Preop -17.1 ± 19.2    -3. ± 2.6    < 0.001*
 Ultimate PO-PO#1 M -1. ± 0.6    15. ± 9.5    < 0.001*
CrSVA-S (mm)
 Preop 50.2 ± 18.7    48.9 ± 17.8    0.249
 PO#1 M 31.5 ± 18.4 < 0.001*   33.5 ± 15.3 < 0.001*   0.333
 Ultimate PO 33.2 ± 11.6 < 0.001* 0.474 45.5 ± 23.4 0.188 < 0.001* < 0.001*
 Ultimate PO-Preop -17.0 ± 8.6    -3.4 ± 2.6    0.021*
 Ultimate PO-PO#1 M 1.7 ± 1.2    12 ± 5.5    < 0.001*
CrSVA-H (mm)
 Preop −19.1 ± 6.1    −18.0 ± 9.3    0.519
 PO#1 M −8.5 ± 6.5 < 0.001*   −9.6 ± 6.9 < 0.001*   0.425
 Ultimate PO −7.2 ± 3.5 < 0.001* 0.112 −16.6 ± 7.3 0.103 0.008* < 0.001*
 Ultimate PO-Preop 11.9 ± 8.9    1.4 ± 0.9    < 0.001*
 Ultimate PO-PO#1 M 1.3 ± 0.6    -7.0 ± 4.3    0.022*
  1. *Statistically significant if p < 0.05. aStudent t test
  2. Preop Preoperative, PO#1 M Postoperative 1 month, Ultimate PO The ultimate follow-up, C7SVA C7 sagittal vertical axis, CrSVA-H Head sagittal vertical axis-Hip, CrSVA-S Head sagittal vertical axis-Sacrum;