Table 4.
Comparison of the accuracy of age estimation between the South Chinese formula based on ridge regression and Cameriere's European formula for males and females in the test dataset 1 (144 OPGs).
| Gender | Number | Difference in ME (SD) | P-value | Difference in MAE (SD) | P-value | Difference in RMSE |
|---|---|---|---|---|---|---|
| Males | 72 | 0.45 (0.96) | 0.00* | −0.49 (0.64) | 0.00* | −0.48 |
| Females | 72 | 0.55 (0.85) | 0.00* | −0.61 (0.62) | 0.00* | −0.63 |
| Total | 144 | 0.50 (0.90) | 0.00* | −0.55 (0.63) | 0.00* | −0.56 |
ME: mean error; MAE: mean absolute error; SD: standard deviation; RMSE: root mean square error.
P-value: obtained using paired samples t test or Wilcoxon's signed rank test.
*
Values that showed significant difference.