Chronological Age Estimation of Male Occipital Bone Based on FTIR and Raman Microspectroscopy

Table 2

FTIR and Raman statistical results in different age stage. The values are represented as mean ± SD. The results of Kruskal–Wallis test that failed to exhibit normal distributions or equal variance. And the rest are the results of single-factor ANOVA.

Parameter	0∼3 years	3∼12 years	12∼19 years	19∼35 years	35∼60 years	>60 years	-Value
FTIR
Mineral/matrix	5.0219 ± 1.1423	5.9182 ± 0.5449	5.8013 ± 0.547	6.2286 ± 1.0708	7.2973 ± 0.8775	7.3667 ± 0.1226	<0.01
Carbonate/phosphate	0.0128 ± 0.0008	0.0132 ± 0.0006	0.0133 ± 0.0011	0.0146 ± 0.0008	0.0146 ± 0.0008	0.0146 ± 0.0006	<0.01
Crystallinity	1.0847 ± 0.0230	1.0992 ± 0.0089	1.0859 ± 0.0082	1.0965 ± 0.0126	1.1080 ± 0.0158	1.1120 ± 0.0173	<0.01
Collagen maturity	3.1074 ± 0.2716	2.8954 ± 0.0969	2.9560 ± 0.0946	2.9176 ± 0.1182	3.1644 ± 0.3339	3.2543 ± 0.3389	<0.01
Raman
Mineral/matrix	0.5880 ± 0.0899	0.6980 ± 0.0692	0.6417 ± 0.0814	0.7369 ± 0.0977	0.7388 ± 0.0692	0.7884 ± 0.0775	<0.01
Carbonate/phosphate	0.1315 ± 0.0102	0.1280 ± 0.0069	0.1326 ± 0.0165	0.1569 ± 0.0073	0.1492 ± 0.0141	0.1461 ± 0.0124	<0.01
Crystallinity	0.0504 ± 0.0011	0.0511 ± 0.0003	0.0515 ± 0.0006	0.0519 ± 0.0005	0.0523 ± 0.0006	0.0523 ± 0.0005	<0.01
Collagen maturity	1.3023 ± 0.1286	1.2197 ± 0.1054	1.2662 ± 0.1815	1.3219 ± 0.1631	1.3099 ± 0.1176	1.4021 ± 0.1462	0.094