Table 7. Comparison between chronological age and dental age estimated using Bedek et al., 6- teeth formulae in boys and girls.
|
Age
Groups (n) |
Mean (SD) | 95% CI of age difference | t statistics (df) | p-value | ||
|---|---|---|---|---|---|---|
| Chronological Age (CA) |
Dental
Age (DA) |
DA-CA
(SE) |
||||
| Boys | ||||||
| 7- 7.9 (7) | 7.35 (0.29) | 8.51 (0.36) | 1.15 (0.16) | 0.75 to 1.55 | 7.08 (6) | 0.000* |
| 8- 8.9 (14) | 8.51 (0.29) | 9.14 (0.61) | 0.63 (0.18) | 0.23 to 1.03 | 3.43 (13) | 0.004* |
| 9- 9.9 (24) | 9.37 (0.26) | 10.36 (1.26) | 0.98 (0.26) | 0.43 to 1.53 | 3.72 (23) | 0.001* |
| 10- 10.9 (28) | 10.39 (0.26) | 11.48 (0.96) | 1.09 (0.17) | 0.73 to 1.45 | 6.29 (27) | 0.000* |
| 11- 11.9 (36) | 11.4 (0.29) | 12.88 (0.81) | 1.47 (0.13) | 1.2 to 1.74 | 11.51 (35) | 0.000* |
| 12- 12.9 (49) | 12.47 (0.27) | 13.35 (1.1) | 0.88 (0.15) | 0.56 to 1.19 | 5.64 (48) | 0.000* |
| 13- 13.9 (53) | 13.51 (0.29) | 14.12 (0.82) | 0.62 (0.11) | 0.42 to 0.82 | 6.16 (52) | 0.000* |
| 14- 14.9 (64) | 14.44 (0.29) | 14.56 (0.47) | 0.12 (0.06) | -0.01 to 0.25 | 1.81 (63) | 0.075 |
| 7- 14.9 (275) | 12.17 (2.01) | 12.93 (1.91) | 0.75 (0.05) | 0.64 to 0.87 | 13.24 (274) | 0.000* |
| Girls | ||||||
| 7- 7.9 (10) | 7.52 (0.31) | 7.63 (1.79) | 0.11 (0.54) | -1.11 to 1.33 | 0.19 (9) | 0.848 |
| 8- 8.9 (16) | 8.34 (0.25) | 7.65 (1.27) | -0.68 (0.33) | -1.39 to 0.02 | -2.06 (15) | 0.057 |
| 9- 9.9 (22) | 9.45 (0.25) | 9.17 (1.96) | -0.28 (0.41) | -1.14 to 0.58 | -0.67 (21) | 0.508 |
| 10- 10.9 (37) | 10.42 (0.25) | 10.01 (1.17) | -0.41 (0.18) | -0.78 to -0.04 | -2.25 (36) | 0.030* |
| 11- 11.9 (94) | 11.41 (0.28) | 10.88 (1.12) | -0.52 (0.11) | -0.75 to -0.29 | -4.49 (93) | 0.000* |
| 12- 12.9 (79) | 12.43 (0.28) | 12.01 (1.16) | -0.41 (0.12) | -0.67 to -0.16 | -3.29 (78) | 0.001* |
| 13- 13.9 (53) | 13.46 (0.29) | 13.23 (1.06) | -0.22 (0.14) | -0.51 to 0.06 | -1.59 (52) | 0.118 |
| 14- 14.9 (64) | 14.46 (0.23) | 14.16 (0.75) | -0.29 (0.09) | -0.47 to -0.11 | -3.24 (63) | 0.002* |
| 7- 14.9 (375) | 11.99 (1.8) | 11.6 (2.16) | -0.38 (0.05) | -0.5 to -0.26 | -6.49 (374) | 0.000* |
*Statistically significant (p<0.05); SD Standard deviation; SE Standard error; df degree of freedom