Table 4.
Mean values ( ± standard deviation) of Spinopelvic parameters in the two study groups based on changes in pelvic tilt after spinal fusion
| 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 |
SC7D = sacro-C7 plume line distance; SFD = sacro-femoral distance
*Values are means from studies that included adult subjects aged 20 to 85 years without any symptom or history suggestive of spinal disease [5,7,22-33].
†p < 0.05; Statistical significance of value between preoperative and last follow up was determined using Wilcoxon's signed rank test.
‡p < 0.05; Statistical significance of value between group A and B was determined using Mann-Whitney U test.