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ROC curve of BMD(L), BMD(F), T11/12 HDPAIS, L1/L2 HDPAIS, PINP, and 25-(OH)D. ROC, receiver operating characteristic; BMD, bone mineral density; HDPAIS, the height difference between the posterior and anterior edges of the intervertebral space; PINP: procollagen type 1 N-terminal propeptide.
