Table 2.

Parameters related to the reproducibility analysis

	Validation coefficientsa				Mean ± SD (cm)			Variation coefficientb
	Cronbach’s α	Hotelling’s T-Squared	ICC	Total	Females	Males	p valuec	Females	Males	p valued
FS height	0.999	<0.001	0.997	2.92 ± 1.13	2.65 ± 0.93	3.19 ± 1.26	0.018	35.1%	39.5%	0.035
FS width	0,993	<0.001	0.967	5.21 ± 1.73	4.99 ± 1.59	5.43 ± 1.85	0.201	31.9%	34.1%	0.406
FS diameter	0.993	<0.001	0.967	1.12 ± 0.39	0.96 ± 0.26	1.28 ± 0.43	<0.001	27.1%	33.6%	0.001
RMS height	0.999	<0.001	0.994	3.65 ± 0.49	3.48 ± 0.45	3.82 ± 0.47	<0.001	12.9%	12.3%	0.699
RMS width	0.999	<0.001	0.994	2.83 ± 0.51	2.70 ± 0.42	2.95 ± 0.56	0.011	15.6%	19.0%	0.337
RMS diameter	0.998	0.074	0.998	3.92 ± 0.38	3.83 ± 0.25	4.02 ± 0.46	0.011	6.5%	11.4%	0.015
LMS height	0.999	<0.001	0.999	3.67 ± 0.50	3.51 ± 0.45	3.84 ± 0.49	0.001	12.8%	12.8%	0.966
LMS width	0.999	<0.001	0.994	2.82 ± 0.49	2.66 ± 0.41	2.98 ± 0.51	0.001	15.4%	17.1%	0.287
LMS diameter	0.947	0.351	0.781	3.92 ± 0.36	3.82 ± 0.27	4.02 ± 0.41	0.004	7.1%	10.2%	0.048
MS(x--[R;L])	1.000	0.028	0.998	8.59 ± 0.94	8.21 ± 0.97	8.96 ± 0.74	<0.001	11.8%	8.3%	0.467

FS, Frontal sinus; ICC, Intraclass correlation coefficient; L, Left; MS, Maxillary sinus; R, Right; SD, Standard deviation; (x^--[R;L]), Arithmetic mean between R and L measurements.

^aIntra observer reproducibility.

^bInter observer reproducibility.

^cStudent t-test.

^dLevene’s test.