Effect of bisphosphonates in preventing femoral periprosthetic bone resorption after primary cementless total hip arthroplasty: a meta-analysis

Table 4 Comparison of postoperative BMD ratios at 6 months between each group

ROI	BMD ratios in the bisphosphonates group	BMD ratios in the control group	WMD	[95 % CI]		P of chi-square	I ²	Selected model	P for overall effect
1	98.035	89.227	8.422	4.313	12.531	0.001	88 %	Random-effect model	<0.001
2	97.881	93.224	4.142	0.611	7.672	0.001	85 %	Random-effect model	0.021
3	97.974	95.954	1.930	0.668	3.193	0.041	52 %	Random-effect model	0.003
4	99.810	98.305	1.357	0.188	2.525	0.039	53 %	Random-effect model	0.023
5	99.638	98.188	0.564	−0.855	1.983	0.015	59 %	Random-effect model	0.436
6	96.283	92.148	3.863	1.291	6.435	0.001	80 %	Random-effect model	0.003
7	87.788	79.417	8.371	4.239	12.503	0.001	86 %	Random-effect model	<0.001

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