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Table 6 General and sex results of the comparison of chronological age with each dental method. The Wilcoxon test for paired data was applied

From: Accuracy assessment of dental age estimation with the Willems, Demirjian and Nolla methods in Spanish children: Comparative cross-sectional study

Method n CA DA of the method p-value CA-DA Diff.SD Trend
mean SD mean SD
Willems method for boys 302 8.71 1.88 8.88 1.93 0.001 -0.17 0.88 O
Willems method for girls 302 8.84 2.00 9.19 2.04 0.000 -0.35 0.93 O
Willems method 604 8.77 1.94 9.04 1.99 0.000 -0.26 0.91 O
Demirjian method for boys 302 8.71 1.88 9.44 2.05 0.000 -0.73 0.94 O
Demirjian method for girls 302 8.84 2.00 9.52 2.11 0.000 -0.68 0.95 O
Demirjian method 604 8.77 1.94 9.48 2.08 0.000 -0.70 0.95 O
Nolla method for boys 302 8.71 1.88 7.88 1.80 0.000 0.82 0.98 U
Nolla method for girls 302 8.84 2.00 8.40 1.81 0.000 0.44 0.93 U
Nolla method 604 8.77 1.94 8.14 1.82 0.000 0.63 0.97 U