In terms of serum markers, in the hip fracture group, there were significantly higher mean i-PTH levels (45.7 vs. 35.8 pg/mL), lower mean serum calcium (8.2 vs. 8.9 mg/dL), lower mean serum phosphorus (3.5 vs. 4.2 mg/dL) and lower mean BAP levels (13.0 vs. 18.2 mg/dL) compared to vertebral fracture group (Table 4). The gene discussed is PTH; the disease is hip fracture.