Table 3: Gender-wise analysis of means between Haavikko's, Willems and Demirjian's methods of dental age estimation with chronologic age

				Mean		Std. deviation		Mean difference		Standard error		Paired t-test p-value		Pearson's correlation coefficient
														r		p-value
Males		Chronological age		12.27		1.70		–1.78		0.14		0.001*		0.857		0.001*
		Haavikko's method		10.49		0.96
		Chronological age		12.27		1.70		0.53		0.10		0.001*		0.917		0.001*
		Demirjian's method		12.80		1.79
		Chronological age		12.27		1.70		–0.25		0.22		0.25		0.617		0.001*
		Willems method		12.01		1.91
Females		Chronological age		12.26		1.69		–2.12		0.19		0.001*		0.574		0.001*
		Haavikko's method		10.14		1.09
		Chronological age		12.26		1.69		0.57		0.14		0.001*		0.840		0.001*
		Demirjian's method		12.84		1.84
		Chronological age		12.26		1.69		–0.15		0.12		0.22		0.862		0.001*
		Willems method		12.11		1.71

*Highly significant