Table 2 Comparisons between the estimated dental ages (EDA) and chronological ages (CA) among the studied children using an independent samples t-test
From: Applicability of Demirjian’s method for dental age estimation in a group of Egyptian children
Age group | Gender | Mean ±SD | Mean difference (EDA-CA) | P-value | |
|---|---|---|---|---|---|
CA | EDA | ||||
3–4 | Male | 3.21 ± 0.35 | 4.40 ± 1.04 | 1.19 | 0.006 a |
Female | 3.67 ± 0.3 | 4.55 ± 0.79 | 0.87 | 0.017 b | |
4–5 | Male | 4.39 ± 0.39 | 4.64 ± 0.81 | 0.25 | 0.393 d |
Female | 4.08 ± 0.16 | 4.68 ± 0.78 | 0.60 | 0.052 d | |
5–6 | Male | 5.08 ± 0.27 | 5.99 ± 0.66 | 0.90 | 0.001 a |
Female | 5.32 ± 0.29 | 5.92 ± 0.83 | 0.60 | 0.018 b | |
6–7 | Male | 6 ± 0 | 6.1 ± 1.1 | 0.18 | 0.725 d |
Female | 6.42 ± 0.27 | 6.86 ± 0.45 | 0.44 | 0.018 b | |
7–8 | Male | 7.28 ± 0.32 | 7.86 ± 0.27 | 0.58 | <0.001 c |
Female | 7.34 ± 0.31 | 7.57 ± 0.30 | 0.23 | 0.118 d | |
8–9 | Male | 8.35 ± 0.28 | 8.6 ± 0.38 | 0.25 | 0.116 d |
Female | 8.28 ± 0.33 | 8.36 ± 0.52 | 0.08 | 0.691 d | |
9–10 | Male | 9 ± 0 | 8.4 ± 0.39 | −0.60 | 0.003 a |
Female | 9.20 ± 0.23 | 9.14 ± 0.47 | −0.06 | 0.671 d | |
10–11 | Male | 10.21 ± 0.25 | 10.7 ± 0.35 | 0.57 | 0.001 a |
Female | 10.42 ± 0.32 | 10.41 ± 0.50 | −0.008 | 0.962 d | |
Total | Male | 6.37 ± 2.20 | 6.85 ± 2.05 | 0.466 | 0.192 d |
Females | 7.11 ± 2.21 | 7.44 ± 1.96 | 0. 325 | 0.313 d | |
