When diagnosing pain from sagittal plane decompensation, a pelvic index of what value or greater is significant?

When diagnosing pain from sagittal plane decompensation, a pelvic index of what value or greater is significant?

• A. 0.5
• B. 1.0
• C. 1.5
• D. 2.0

Answer: (B)

Sagittal balance relies on how the pelvis tilts to compensate for spinal misalignment. The pelvic index measures that compensatory rotation, typically as a ratio involving pelvic tilt and sacral slope. As the pelvis tilts more to keep the center of gravity over the feet, the index rises. A pelvic index of about 1.0 or greater signals significant decompensation and is commonly associated with pain from the sagittal imbalance. Values below 1 suggest compensation is still within a tolerable range, while higher values indicate more pronounced misalignment, with 1.0 serving as the key threshold in this context.

Sagittal balance relies on how the pelvis tilts to compensate for spinal misalignment. The pelvic index measures that compensatory rotation, typically as a ratio involving pelvic tilt and sacral slope. As the pelvis tilts more to keep the center of gravity over the feet, the index rises. A pelvic index of about 1.0 or greater signals significant decompensation and is commonly associated with pain from the sagittal imbalance. Values below 1 suggest compensation is still within a tolerable range, while higher values indicate more pronounced misalignment, with 1.0 serving as the key threshold in this context.