Comparative assessment of the Willems dental age estimation methods: a Chinese population-based radiographic study

Table 2 Accuracy comparison of Willems I method of dental age estimation

Gender	Age group	CA (years) (mean ± SD)	DA (years) (mean ± SD)	CA–DA (years) (mean ± SD)	p	MAE
Boys	11	11.47 ± 0.28	11.52 ± 0.91	(−)0.05 ± 0.98	0.665	0.78
	12	12.50 ± 0.28	12.05 ± 0.83	0.45 ± 0.84	0	0.75
	13	13.46 ± 0.28	13.05 ± 1.18	0.40 ± 1.20	0.001	1.03
	14	14.42 ± 0.31	14.19 ± 1.60	0.23 ± 1.59	0.147	1.12
	15	15.48 ± 0.28	14.85 ± 1.15	0.63 ± 1.14	0	1.05
	16	16.48 ± 0.24	15.53 ± 0.73	0.95 ± 0.77	0	0.95
	Total	13.98 ± 1.63	13.54 ± 1.79	0.44 ± 1.17	0	0.95
Girls	11	11.45 ± 1.16	12.11 ± 1.64	(−)0.66 ± 1.34	0	1.03
	12	12.46 ± 0.29	13.03 ± 1.04	(−)0.58 ± 1.05	0	0.86
	13	13.49 ± 0.26	13.62 ± 1.26	(−)0.13 ± 1.24	0.289	1.02
	14	14.47 ± 0.32	14.09 ± 1.75	0.39 ± 1.72	0.025	1.25
	15	15.43 ± 0.27	15.12 ± 1.04	0.31 ± 1.04	0	0.76
	16	16.46 ± 0.29	15.38 ± 0.82	1.08 ± 0.80	0	1.08
	Total	14.03 ± 1.81	13.93 ± 1.73	0.09 ± 1.37	0..091	1

ISSN: 1472-6831