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

Salma, Rehab Samir; AbdElfatah, Omnia M.

doi:10.1186/s41935-023-00347-0

Egyptian Journal of Forensic Sciences

Table 12 Intraclass Correlation Coefficient for chronological age and new models in group II (n = 115)

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

	ICC coefficient	95% C.I	P
Overall (n = 115)		LL UL
Chronological age vs. EGY I	0.819	0.749 – 0.871	< 0.001^*
Chronological age vs. EGY II	0.803	0.727 – 0.860	< 0.001^*
Chronological age vs. EGY III	0.691	0.582 – 0.776	< 0.001^*
Age group
Group 6—< 9 years (n = 84)
Chronological age vs. EGY I	0.724	0.604 – 0.812	< 0.001^*
Chronological age vs. EGY II	0.699	0.571 – 0.794	< 0.001^*
Chronological age vs. EGY III	0.616	0.464 – 0.733	< 0.001^*
Group ≥ 9—14 years (n = 31)
Chronological age vs. EGY I	0.544	0.240 – 0.751	0.001^*
Chronological age vs. EGY II	0.514	0.200 – 0.732	0.001^*
Chronological age vs. EGY III	0.508	0.193 – 0.728	0.001^*
Sex
Male overall (n = 58)
Chronological age vs. EGY I	0.812	0.701 – 0.884	< 0.001^*
Chronological age vs. EGY II	0.783	0.659 – 0.866	< 0.001^*
Chronological age vs. EGY III	0.723	0.573 – 0.826	< 0.001^*
Group 6—< 9 years (n = 40)
Chronological age vs. EGY I	0.624	0.391 – 0.782	< 0.001^*
Chronological age vs. EGY II	0.589	0.343 – 0.759	< 0.001^*
Chronological age vs. EGY III	0.529	0.264 – 0.720	< 0.001^*
Group ≥ 9—14 years (n = 18)
Chronological age vs. EGY I	0.511	0.072 – 0.784	0.013^*
Chronological age vs. EGY II	0.510	0.071 – 0.783	0.013^*
Chronological age vs. EGY III	0.452	-0.004 – 0.753	0.026^*
Female overall (n = 57)
Chronological age vs. EGY I	0.827	0.724 – 0.895	< 0.001^*
Chronological age vs. EGY II	0.827	0.722 – 0.894	< 0.001^*
Chronological age vs. EGY III	0.643	0.462 – 0.773	< 0.001^*
Group 6—< 9 years (n = 44)
Chronological age vs. EGY I	0.806	0.670 – 0.889	< 0.001^*
Chronological age vs. EGY II	0.796	0.655 – 0.883	< 0.001^*
Chronological age vs. EGY III	0.688	0.494 – 0.817	< 0.001^*
Group ≥ 9—14 years (n = 13)
Chronological age vs. EGY I	0.481	-0.070 – 0.807	0.041^*
Chronological age vs. EGY II	0.419	-0.146 – 0.778	0.068
Chronological age vs. EGY III	0.500	-0.044 – 0.815	0.034^*

EGY I: Upper and Lower model
EGY II: Upper model
EGY III: Lower model
poor agreement < 0.50, moderate agreement 0.50—< 0.75
good agreement 0.75—0.90, excellent agreement > 0.90
CI Confidence interval, LL Lower limit, UL Upper Limit
^*Statistically significant at p ≤ 0.05

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