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Comparison of bone mineral density (BMD) scores and 10-year fracture probabilities based on fracture risk assessment tool (FRAX) calculations between patients with ankylosing spondylitis and healthy controls after age, sex, and body mass index matching. (A) Bone mineral density by dual energy x-ray absorptiometry. (B,C) Risk assessment using FRAX calculation. * p < 0.05.
