Table 6.

Comparison of lumbar spine bone density difference between two groups before and after treatment (x̅±s)

	Group	Number of samples	Difference before and after treatment	t	P	95% CI of difference
Left femoral bone density (g/cm2)	Zhuanggu Zhitong Recipe Group	46	0.188±0.021	-2.83	0.006	-0.022~-0.003
	Alendronate sodium group	45	0.201±0.022

Note: The normality test was performed on the difference in bone density between the two groups before and after treatment. The results were 0.776 and 0.226 respectively, which satisfied the normality. The homogeneity of variance test L(1,89)=0.109, P=0.742, which satisfies the homogeneity of variances and uses the independent sample T test.