Table 2. Comparing the accuracy of Demirjian’s, Cameriere’s, Smith’s, and Willem’s methods using paired t-tests .

Age difference	Girls	Boys	Total	P
	(n = 273)	(n = 264)	(n = 537)	(Total)
Chronological age - Demirjian’s method	0.85±0.98	0.90±1.01	0.87±1.00	0.000
Chronological age - Willem’s method	0.31±0.91	0.43±0.82	0.36±0.87	0.000
Chronological age - Cameriere’s method	-0.11±0.87	-0.27±0.85	-0.19±0.86	0.000
Chronological age - Smith’s method	0.00±0.81	0.12±0.83	0.06±0.63	0.079*
Demirjian’s method - Willem’s method	0.54±0.64	0.47±0.63	0.51±0.74	0.000
Demirjian’s method - Cameriere’s method	0.96±0.75	1.17±0.72	1.06±0.74	0.000
Demirjian’s method - Smith’s method	0.84±0.75	0.78±0.73	0.81±0.58	0.000
Willem’s method - Cameriere’s method	0.42±0.62	0.70±0.50	0.55±0.53	0.000
Willem’s method - Smith’s method	0.30±0.56	0.31±0.51	0.30±0.51	0.000
Cameriere’s method - Smith’s method	-0.12±0.62	-0.38±0.55	-0.25±0.60	0.000