Table 2.

Bone mineral density (BMD) of each group before and after treatment (g/cm²).

Groups		Part
		Head	Upper limb	Femur	Trunk	Rib	Pelvis	Spine	Whole body
Control group	Prior to treatment	0.237 ± 0.010	0.153 ± 0.032	0.142 ± 0.011	0.125 ± 0.009	0.113 ± 0.006	0.132 ± 0.017	0.132 ± 0.008	0.149 ± 0.005
	Posttreatment	0.243 ± 0.016	0.144 ± 0.026	0.156 ± 0.012#O	0.125 ± 0.008#	0.110 ± 0.007#	0.134 ± 0.017#	0.137 ± 0.009#	0.153 ± 0.007#
GIOP group	Prior to treatment	0.225 ± 0.015∗	0.131 ± 0.031	0.127 ± 0.008∗	0.110 ± 0.007∗	0.099 ± 0.012∗	0.113 ± 0.013∗	0.108 ± 0.010∗	0.132 ± 0.004∗
	Posttreatment	0.235 ± 0.021	0.123 ± 0.032	0.132 ± 0.011	0.114 ± 0.007	0.102 ± 0.007	0.117 ± 0.016	0.111 ± 0.015	0.135 ± 0.009
Calcium group	Prior to treatment	0.221 ± 0.010∗	0.147 ± 0.035	0.120 ± 0.013∗	0.106 ± 0.009∗	0.102 ± 0.012∗	0.104 ± 0.012∗	0.110 ± 0.010∗	0.131 ± 0.005∗
	Posttreatment	0.237 ± 0.024	0.119 ± 0.033	0.129 ± 0.019	0.113 ± 0.014	0.100 ± 0.008	0.123 ± 0.018O	0.125 ± 0.018#O	0.141 ± 0.013
PEMF group	Prior to treatment	0.219 ± 0.006∗	0.138 ± 0.009	0.120 ± 0.009∗	0.107 ± 0.010∗	0.100 ± 0.013∗	0.101 ± 0.015∗	0.110 ± 0.007∗	0.133 ± 0.006∗
	Posttreatment	0.234 ± 0.024	0.112 ± 0.035	0.133 ± 0.018O	0.117 ± 0.008O	0.104 ± 0.008	0.117 ± 0.018O	0.130 ± 0.013#O	0.148 ± 0.008#O

Compared with the control group before treatment, ^∗ P < 0.05; compared with the GIOP group after treatment, ^# P < 0.05; compared with before treatment, ^O P < 0.05.