Table 3 Pre- to postoperative differences of the sagittal alignment parameters for each rater separately. aMedian (IQR), SL = segmental lordosis, vDH = ventral disc height, dDH = dorsal disc height, LL = lumbar lordosis, PI = pelvic incidence, PT = pelvic tilt, SS = sacral slope, SVA = sagittal vertical axis. Significant values (p < 0.05) are marked in bold type
preoperativea | postoperativea | Δ | p | preoperativea | postoperativea | Δ | p | |
|---|---|---|---|---|---|---|---|---|
Rater | Rater A | Rater B | ||||||
SL | 19.0° (13.0 - 25.0) | 24.0° (20.0 - 27.0) | +5.0° | <0.001 | 20.2° (15.5 - 24.3) | 25.3° (18.3 - 30.9) | +5.1° | 0.001 |
vDH | 8.0mm (4.0 - 10.0) | 13.0mm (11.0 - 14.0) | +5.0mm | <0.001 | 6.5mm (4.9 - 8.3) | 13.5mm (11.9 - 15.2) | +7.0mm | <0.001 |
dDH | 3.0mm (2.0 - 4.0) | 5.0mm (4.0 - 6.0) | +2.0mm | <0.001 | 4.5mm (3.4 - 5.8) | 8.4mm (7.0 - 10.2) | +3.9mm | <0.001 |
LL | 57.0° (50.0 - 64.0) | 59.5° (52.0 - 68.0) | +2.5° | 0.014 | 57.0° (50.2 - 67.7) | 59.1° (51.9 - 68.1) | +2.1° | 0.171 |
PI | 59.0° (50.0 - 68.0) | 59.5° (52.8 - 69.0) | +0.5° | 0.649 | 60.6° (56.0 - 69.6) | 61.6° (54.1 - 67.8) | +1.0° | 0.061 |
PT | 20.0° (11.0 - 25.0) | 19.0° (13.0 - 23.5) | -1.0° | 0.231 | 20.9° (13.9 - 27.4) | 20.6° (14.2 - 25.4) | -0.3° | 0.251 |
SS | 43.0° (37.0 - 48.0) | 44.0° (38.8 - 49.0) | -1.0° | 0.194 | 42.1° (36.2 - 45.9) | 42.0° (35.9 - 47.1) | -0.1° | 0.630 |
SVA | 22.5mm (12.3 - 50.5) | 25.0mm (9,5 - 43.5) | +2.5mm | 0.751 | 24.9mm (14.6 - 47.6) | 26.1mm (17.1 - 41.4) | +1.2mm | 0.856 |
Rater | Rater C | Rater D | ||||||
SL | 17.1° (11.8 - 22.4) | 21.6° (18.8 - 26.6) | +4.5° | 0.001 | 17.2° (13.2 - 22.7) | 21.1° (18.2 - 26.3) | +3.9° | 0.012 |
vDH | 5.8mm (3.6 - 7.7) | 13.6mm (12.3 - 14.8) | +7.8mm | <0.001 | 6.3mm (4.4 - 7.5) | 13.2mm (11.2 - 14.0) | +6.9mm | <0.001 |
dDH | 3.7mm (2.3 - 4.7) | 9.1mm (6.5 - 10.3) | +5.4mm | <0.001 | 3.6mm (2.2 - 4.2) | 7.4mm (5.1 - 9.5) | +3.8mm | <0.001 |
LL | 53.8° (47.4 - 64.8) | 57.5° (48.7 - 67.9) | +3.8° | 0.015 | 59.3° (50.2 - 66.0) | 57.1° (50.9 - 66.7) | -2.2° | 0.522 |
PI | 56.7° (51.4 - 70.2) | 60.7° (48.9 - 68.8) | +4.0° | 0.534 | 59.0° (52.1 - 73.2) | 60.6° (54.1 - 68.9) | +1.6° | 0.067 |
PT | 20.3° (13.4 - 28.7) | 18.6° (14.1 - 25.9) | -1.7° | 0.273 | 21.3° (13.0 - 27.6) | 19.3° (13.9 - 24.9) | -2.0° | 0.202 |
SS | 39.8° (31.9 - 44.8) | 39.4° (32.7 - 47.5) | -0.4° | 0.624 | 42.2° (36.0 - 48.7) | 39.7° (34.6 - 47.3) | -2.5° | 0.591 |
SVA | 21.3mm (6.6 - 47.7) | 24.7mm (6.6 - 39.8) | +3.4mm | 0.983 | 22.0mm (13.1 - 46.0) | 23.0mm (6.3 - 39.0) | +1.0mm | 0.577 |