2.

再骨折组与对照组临床定量数据的比较

Comparison of the quantitative variables between re-fracture and control groups (Mean±SD)

Factors	Re-fracture group (18 cases)	Control group (116 cases)	t	P
Age (y)	74.89±8.35	72.92±9.09	0.919	0.367
BMD	4.13±1.05	3.14±1.12	2.203	0.034
Cement volume (mL)	3.20±1.07	2.86±0.71	1.748	0.083
Volume-cubage index	0.12±0.03	0.11±0.06	0.750	0.941
Distribution index	1.72±0.58	3.26±1.50	4.273	< 0.001