Table 4 Comparison of the actual and estimated age by the regression model including significant variables (n = 300)
From: Age estimation by pulp to tooth area ratio in canine teeth using cone-beam computed tomography
Age group (year) | N | Observed age | Predicted age | Difference (predict–observed) | P value |
|---|---|---|---|---|---|
Mean ± SD | Mean ± SD | Mean ± SD | |||
Under 20 | 37 | 17.14 ± 1.68 | 20.58 ± 6.57 | 3.45 ± 6.48 | 0.003 |
20–30 | 76 | 25.32 ± 2.73 | 27.47 ± 5.71 | 2.15 ± 4.97 | 0.000 |
30–40 | 70 | 35.26 ± 2.74 | 35.65 ± 5.42 | 0.29 ± 5.62 | 0.569 |
40–50 | 70 | 45.82 ± 3.05 | 44.62 ± 3.87 | − 1.21 ± 4.58 | 0.033 |
50–60 | 47 | 54.21 ± 2.71 | 48.75 ± 4.95 | − 5.47 ± 5.21 | 0.000 |