Variables Formula R2 S2 Margin of error for age Direct TH Ln(Age) = 3.130 – 0.061×Sex + 0.096×TH +0.009×Sex×TH 0.960 0.014 ±1.027 Indirect TH Ln(Age) = -0.264+0.049×CT Axes+0.341×TH-0.006× CT Axes ×TH 0.946 0.092 ±1.197

Table 1: Direct and indirect age estimation formulas and their margin of errors depending on tooth height dimension