Table 1.
Univariate and Multivariate Linear Regression Analysis to Predict Age of an Individual Based on Attrition Score with/without Habit and Number of Cusps Involved Stratified by Sex and Arch Involved
| Group (N) | R | R2 (Coefficient of Determination) | Std. Error of the Estimate | Equation | P-value (<0.05 is Significant: Marked in Red) |
|---|---|---|---|---|---|
| Univariate analysis | |||||
| Female (70) | 0.535 | 0.286 | 8.901 | Age=25.711+2.015(Attrition score) | <0.001 |
| Male (66) | 0.711 | 0.505 | 9.396 | Age=23.187+3.149(Attrition score) | <0.001 |
| Maxillary (27) | 0.814 | 0.662 | 8.522 | Age=24.564+3.724(Attrition score) | <0.001 |
| Mandibular (109) | 0.578 | 0.334 | 9.036 | Age=24.4+2.259(Attrition score) | <0.001 |
| Total (136) | 0.631 | 0.398 | 9.231 | Age=24.297+2.599(Attrition score) | <0.001 |
| Multivariate analysis including the presence of chewing habit, number of cusps involved | |||||
| Female (70) | 0.560 | 0.313 | 8.864 | Age=22.852+0.627(habit)+2.603(Cusps involved)+0.884(Attrition score) | 0.279 |
| Male (66) | 0.714 | 0.51 | 9.5 | Age=24.004–2.168(habit)+-0.542(Cusps involved)+3.451(Attrition score) | <0.001 |
| Maxillary (27) | 0.819 | 0.67 | 8.776 | Age=24.755+3.253(habit)+-0.551(Cusps involved)+3.875(Attrition score) | 0.002 |
| Mandibular (109) | 0.585 | 0.342 | 9.071 | Age=23.519–1.482(habit)+0.893(Cusps involved)+1.939(Attrition score) | 0.002 |
| Total (136) | 0.633 | 0.4 | 9.282 | Age=23.681–0.751(habit)+0.625(Cusps involved)+2.361(Attrition score) | <0.001 |