TABLE 4.
Regression models for the observed teeth and ratio parameters
| Tooth | Predictors | Model | Performance | ||
|---|---|---|---|---|---|
| R 2 | RMSE | MAE | |||
| C | UTVR‐C, LTVR‐C, & Sex | 77.393−348.379 UTVR‐C−565.709 LTVR‐C + 2140.073 (LTVR‐C)2−3.961 s | 0.66 | 6.88 | 5.45 |
| UTVR‐C | 56.77−583.095 UTVR‐C | 0.38 | 9.3 | 7.5 | |
| LTVR‐C | 68.923−628.93 LTVR‐C + 2217.17 (LTVR‐C)2 | 0.62 | 7.5 | 5.83 | |
| Li | UTVR‐Li & LTVR‐Li | 63.09−301.38 UTVR‐Li−204.65 LTVR‐Li | 0.67 | 6.67 | 5.3 |
| UTVR‐Li | 57.31−475.26 UTVR‐Li | 0.44 | 8.6 | 7 | |
| LTVR‐Li | 55.95−271.38 LTVR‐Li | 0.56 | 7.76 | 6.27 | |
| Ci | UTVR‐Ci & LTVR‐Ci | 64.21−368.32 UTVR‐Ci−214.41 LTVR‐Ci | 0.59 | 7.6 | 6.19 |
| UTVR‐Ci | 59.48−568.93 UTVR‐Ci | 0.5 | 8.5 | 6.9 | |
| LTVR‐Ci | 58.4−337.25 LTVR‐Ci | 0.46 | 8.5 | 7.19 | |
Abbreviations: C, maxillary canine; Li, maxillary lateral incisor; Ci, maxillary central incisor; UTVR, upper tooth volume ratio; LTVR, lower tooth volume ratio; s, sex (M = 1; F = 0); R 2, coefficient of determination; RMSE, root mean squared error; MAE, mean average error.