Table 2.

Comparison of chronological age with age estimated using London estimation and Demirjian estimation methods.

Gender		N	Minimum	Maximum	Mean	Std. Deviation	Mean Difference	p-Value
Male	London Estimation–Chronological age	357	−0.70	1.76	0.03	0.34	0.03	0.079
	Demirjian Estimation–Chronological age	357	−1.93	2.74	0.55	0.84	0.55	<0.001 ***
	London Estimation–Demirjian Estimation	357	−2.50	2.30	−0.52	0.89	−0.52	<0.001 ***
Female	London Estimation–Chronological age	354	−0.81	0.64	0.00	0.34	−0.002	0.872
	Demirjian Estimation–Chronological age	354	−0.84	3.21	0.76	0.51	0.76	<0.001 ***
	London Estimation–Demirjian Estimation	354	−3.10	0.80	−0.76	0.57	−0.76	<0.001 ***

*** p < 0.001 is very highly statistically significant. Wilcoxon signed-rank test.