Improving CT Image Analysis of Augmented Bone with Raman Spectroscopy

Table 5

Results of the multiple linear regression.

Model	Raman spectra	Unstand. coefficient	Stand. coefficient	Significance (𝑡-test)	Confidence interval; (at a level of 0.95)
	Constant	182.438	—	—	165.405	199.471
	Bio-Oss	−0.050	−0.049	0.022	−0.092	−0.007
	Tricalcium phosphate	0.009	0.013	0.593	−0.023	0.041
	Pork bone	−0.109	−0.391	0.000	−0.132	−0.085
1	Pork fat	0.153	0.172	0.000	0.095	0.210
	Amide I	−0.087	−0.064	0.058	−0.176	0.003
	CH bending	0.547	0.550	0.000	0.483	0.612
	CH stretching	−0.384	−0.179	0.000	−0.482	−0.287
	Phosphate stretching	−0.099	−0.201	0.000	−0.126	−0.071
	Carbonate substitution	−0.709	−0.356	0.000	−0.809	−0.609
	Constant	183.728	—	—	167.366	200.090
	Bio-Oss	−0.048	−0.047	0.026	−0.090	−0.006
	Pork bone	−0.104	−0.375	0.000	−0.122	−0.087
	Pork fat	0.147	0.165	0.000	0.094	0.199
2	Amide I	−0.097	−0.072	0.018	−0.178	−0.016
	CH bending	0.551	0.554	0.000	0.488	0.614
	CH stretching	−0.389	−0.181	0.000	−0.485	−0.293
	Phosphate stretching	−0.096	−0.196	0.000	−0.122	−0.070
	Carbonate substitution	−0.701	−0.352	0.000	−0.797	−0.605