J Rheumatol
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To assess the sensitivity to change of 13 spinal, shoulder, and hip measurements and determine correlation between age, disease duration, and radiologic findings in ankylosing spondylitis (AS) and other spondyloarthropathies (SpA). ⋯ Finger to floor distance, TLR, and thoracolumbar lateral flexion were the most sensitive to detect improvements in short term clinical trials, while the Schober test, thoracolumbar flexion, and occiput-wall distance were insensitive.