Table 3.

Coefficient of variation and intra-observer and inter-observer agreement for: mandibular body length (Go–Me) and mandibular body growth (ΔGo–Me) for both imaging methods; Mandibular symphyseal angle (GoR–Mê–GoL) and inter-gonial distance (GoR–GoL) for CBCT.

	Coeff var				ICC
	Mean ± SD	95% IC lower	95% IC upper	P valueb	Intra-observer (Obs. I; Obs. II)	Interobservera
Go–Me R T1
CBCT	0.098 ± 0.005	0.085	0.111	0.314	0.995; 0.989	0.984
RLC	0.120 ± 0.011	0.093	0.148		0.988; 0.982	0.963
Go–Me R T2
CBCT	0.094 ± 0.007	0.076	0.111	0.427	0.995; 0.997	0.981
RLC	0.118 ± 0.017	0.076	0.160		0.995; 0.989	0.956
Go–Me L T1
CBCT	0.091 ± 0.006	0.077	0.104	0.201	0.994; 0.991	0.986
RLC	0.116 ± 0.011	0.089	0.142		0.988; 0.975	0.967
Go–MeL T2
CBCT	0.089 ± 0.006	0.073	0.105	0.428	0.992; 0.996	0.982
RLC	0.121 ± 0.014	0.087	0.156		0.991; 0.984	0.964
Δ Go–Me L growth
CBCT	0.428 ± 0.011	0.362	0.414	0.593	0.966; 0.972	0.918
RLC	0.524 ± 0.089	0.303	0.745		0.951; 0.924	0.875
Δ Go–Me R growth
CBCT	0.488 ± 0.044	0.378	0.598	0.965	0.955; 0.965	0.957
RLC	0.451 ± 0.046	0.337	0.566		0.956; 0.938	0.887
GoR–Mê–GoL T1
CBCT	0.092 ± 0.005	0.079	0.106		0.966; 0.953	0.984
GoR–Mê–GoL T2
CBCT	0.101 ± 0.007	0.084	0.118		0.992; 0.974	0.988
GoR–GoL T1
CBCT	0.096 ± 0.004	0.081	0.109		0.952; 0.967	0.981
GoR–GoL T2
CBCT	0.099 ± 0.006	0.084	0.111		0.987; 0.947	0.979

CBCT cone-beam computed tomography, RLC reconstructed lateral cephalogram, Coeff Var coefficient of variation, ICC intraclass correlation coefficient, Obs observer, MBL mandibular body length.

^a nter-observer ICC data are given as the means of measurements at two time points and by two investigators.

^bTwo-sample test for coefficient of variation.