Comprehensive analysis of spinal sagittal balance, spinal bone mineral density, and pulmonary function in severe ankylosing spondylitis using quantitative computed tomography
Ankylosing spondylitis (AS) is frequently complicated by osteoporosis and progressive sagittal malalignment and may be accompanied by respiratory limitation. However, in radiographically severe AS, the cross-sectional relationships among sagittal alignment, spinal volumetric bon…