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Variability in Cup Version Based on Differences in Sacral Slope from Standing to Lateral Decubitus Position
| Difference in sacral slope from lateral decubitus to standing lateral position | |||||
|---|---|---|---|---|---|
| >10° | 5° to 10° | 5° to –5° | –5° to –10° | <–10° | |
| No. of patients | 8 | 6 | 26 | 8 | 2 |
| Mean cup version in cross-table lateral X-ray (°) | 35.33 | 31.90 | 29.26 | 25.60 | 21.94 |
| Mean cup version in standing X-ray (°) | 27.74 | 28.46 | 29.57 | 29.73 | 28.57 |
