BGLAP and cervical disk degenerative disorder: The severity score of the cervical disc degeneration was significantly correlated with age, trunk-muscle strength in flexion, pentosidine, cross-linked N-telopeptide of type 1 collagen, and leucine in men (Table 2); and with age, body mass index, skeletal muscle index, trunk-muscle strength in flexion, T score of bone mineral density, pentosidine, bone tartrate-resistant acid phosphatase-5b, cross-linked N-telopeptide of type 1 collagen, undercarboxylated osteocalcin, 25(OH)D3, lysine in women (Table 3).