TABLE 3.

Amplitude values of axial and sagittal measurements, ICCs, and Bland‐Altman coefficients in each cervical segment in all measurements

		Axial		Sagittal		Difference Axial – Sagittal		Coefficient of repeatability		Intraclass correlation coefficients
Segment	N	Mean	SD	Mean	SD	Mean	SD	1.96 × SD	p	ICC	CImin	CImax	p
C2	62	0.51	0.28	0.48	0.25	0.02	0.12	0.23	.186	.902	.842	.940	<.001
C3	43	0.83	0.56	0.76	0.55	0.07	0.19	0.37	.001	.934	.871	.966	<.001
C4	51	0.83	0.48	0.94	0.53	–0.12	0.30	0.58	.008	.810	.669	.892	<.001
C5	54	1.05	0.54	1.04	0.53	0.01	0.19	0.36	.676	.940	.899	.965	<.001
C6	41	0.89	0.46	0.88	0.41	0.02	0.22	0.43	.600	.876	.779	.932	<.001

Note: The motion amplitude values (all measurements) are reported per cervical segment for axial and sagittal measurements. Additionally, the difference of axial minus sagittal values for each cervical segment is shown. The amplitude difference between axial and sagittal measurements was significantly different from 0 at segment C3 and C4. Intraclass correlation coefficients (ICCs; two‐way mixed model, single measures, absolute agreement) with its 95% confidence interval (CI) are presented for each cervical segment.

Abbreviations: N, number of measurements; SD, standard deviation.