Reliability of mathematical regression models for age estimation in the mixed dentition stage for Egyptian children

Egyptian Journal of Forensic Sciences

Table 4 Multivariate Linear regression analysis for Foti model 2 (upper jaw) affecting chronological age in group I (n = 1000)

	B	SE	95% CI (LL-UL)	T	P
(Constant)	7.132	0.603	5.948 – 8.316	11.821	< 0.001^*
Number of deciduous upper incisors	0.136	0.049	0.040 – 0.231	2.789	0.005^*
Number of deciduous upper molars	-0.260	0.137	-0.529 – 0.010	-1.892	0.059
Number of permanent upper canines	–	–	–	–	–
Number of permanent upper first molars	0.105	0.061	-0.014 – 0.224	1.728	0.084
Number of permanent upper second molars	0.370	0.065	0.242 – 0.499	5.660	< 0.001^*
Number of upper third molars	–	–	–	–	–
Number of permanent upper incisors	0.842	0.049	0.746 – 0.938	17.243	< 0.001^*
Number of permanent upper premolars	0.025	0.141	-0.251 – 0.301	0.177	0.860
Number of deciduous upper canines	-0.084	0.058	-0.197 – 0.030	-1.448	0.148
R² = 0.752, F = 429.777, p < 0.001^*

poor agreement < 0.50, moderate agreement 0.50—< 0.75
good agreement 0.75—0.90, excellent agreement > 0.90
SE Standard Error, C.I Confidence interval, LL Lower limit, UL, Upper Limit, B Unstandardized Coefficients, F,p f and p values for the model, R² Coefficient of determination, t t-test of significance
^*Statistically significant at p ≤ 0.05
EGY II equation: 7.132 + (0.136* Number of deciduous upper incisors) + (-0.260* Number of deciduous upper molars) + (0.105* Number of permanent upper 1st molars) + (0.370* Number of permanent upper 2nd molars) + (0.842* Number of permanent upper incisors) + (0.025* Number of permanent upper premolars) + (-0.084* Number of deciduous upper canines)