Table 11. Comparison between chronological age and dental age estimated using Bedek et al., 2- 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) | 6.22 (0.09) | -1.13 (0.11) | -1.39 to -0.86 | -10.52 (6) | 0.000* |
| 8- 8.9 (14) | 8.51 (0.29) | 6.96 (0.87) | -1.54 (0.25) | -2.1 to -0.98 | -5.98 (13) | 0.000* |
| 9- 9.9 (24) | 9.37 (0.26) | 7.72 (1.56) | -1.64 (0.32) | -2.32 to -0.97 | -5.04 (23) | 0.000* |
| 10- 10.9 (28) | 10.39 (0.26) | 8.99 (1.25) | -1.39 (0.21) | -1.84 to -0.94 | -6.36 (27) | 0.000* |
| 11- 11.9 (36) | 11.4 (0.29) | 10.96 (1.16) | -0.43 (0.18) | -0.82 to -0.04 | -2.29 (35) | 0.028* |
| 12- 12.9 (49) | 12.47 (0.27) | 11.54 (1.42) | -0.93 (0.19) | -1.32 to -0.53 | -4.73 (48) | 0.000* |
| 13- 13.9 (53) | 13.51 (0.29) | 12.83 (1.25) | -0.67 (0.15) | -0.98 to -0.35 | -4.27 (52) | 0.000* |
| 14- 14.9 (64) | 14.44 (0.29) | 13.66 (1.02) | -0.77 (0.12) | -1.01 to -0.52 | -6.33 (63) | 0.000* |
| 7- 14.9 (275) | 12.17 (2.01) | 11.24 (2.55) | -0.92 (0.07) | -1.07 to -0.78 | -12.54 (274) | 0.000* |
| Girls | ||||||
| 7- 7.9 (10) | 7.52 (0.31) | 7.62 (1.61) | 0.09 (0.46) | -0.95 to 1.15 | 0.21 (9) | 0.840 |
| 8- 8.9 (16) | 8.34 (0.25) | 7.24 (1.04) | -1.09 (0.27) | -1.68 to -0.5 | -3.96 (15) | 0.001* |
| 9- 9.9 (22) | 9.45 (0.25) | 8.52 (2.04) | -0.93 (0.43) | -1.83 to -0.02 | -2.13 (21) | 0.044* |
| 10- 10.9 (37) | 10.42 (0.25) | 9.42 (1.58) | -1.01 (0.25) | -1.51 to -0.48 | -3.95 (36) | 0.000* |
| 11- 11.9 (94) | 11.41 (0.28) | 10.54 (1.33) | -0.87 (0.13) | -1.14 to -0.59 | -6.24 (93) | 0.000* |
| 12- 12.9 (79) | 12.43 (0.28) | 11.83 (1.19) | -0.59 (0.13) | -0.85 to -0.33 | -4.55 (78) | 0.000* |
| 13- 13.9 (53) | 13.46 (0.29) | 13.14 (1.12) | -0.31 (0.15) | -0.62 to -0.01 | -2.1 (52) | 0.040* |
| 14- 14.9 (64) | 14.46 (0.23) | 14.08 (0.85) | -0.37 (0.1) | -0.57 to -0.17 | -3.67 (63) | 0.000* |
| 7- 14.9 (375) | 11.99 (1.8) | 11.33 (2.34) | -0.65 (0.06) | -0.78 to -0.51 | -9.76 (374) | 0.000* |
*Statistically significant (p<0.05); SD Standard deviation; SE Standard error; df degree of freedom