Risk factors of primary and recurrent fractures in postmenopausal osteoporotic Chinese patients: A retrospective analysis study

Table 2 Comparison of BMD and bone metabolic markers of patients among groups

Groups	Non-fracture group (n = 1239)	Primary fracture group (n = 1008)	Re-fracture group (n = 231)
L1-4BMD (g/cm²)	0.992 ± 0.169	0.908 ± 0.163**	0.858 ± 0.149**®
Total hip BMD (g/cm²)	0.837 ± 0.138	0.757 ± 0.134**	0.715 ± 0.133**®
Femoral neck BMD (g/cm²)	0.770 ± 0.138	0.701 ± 0.119**	0.667 ± 0.115**®
Serum BGP (ng/mL)	21.048 ± 16.723	20.821 ± 13.330	19.670 ± 8.321
Serum CTX (pg/mL)	474.510 ± 280.312	471.710 ± 249.419	464.598 ± 222.905
Serum Ca (mmol/L)	2.280 ± 0.127	2.280 ± 0.122	2.272 ± 0.126
Serum P (mmol/L)	1.221 ± 0.177	1.195 ± 0.169**	1.196 ± 0.155
Serum PTH (pg/mL)	44.515 ± 27.545	46.151 ± 23.154	46.500 ± 22.257
Serum 25OHD (nmol/L)	52.401 ± 19.709	54.037 ± 36.010	51.780 ± 20.102

Compared to the non-fracture group: * indicates P < 0.05 and ** indicates P < 0.01; compared to the primary fracture group, ®indicates P < 0.01

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