TABLE 4.

Amplitude values of axial and sagittal measurements, ICCs, and Bland‐Altman coefficients in each cervical segment in subgroups with different venc

Velocity encoding 2 cm/second
		Axial		Sagittal		Bland‐Altman coefficients				Intraclass correlation coefficients
Segment	N	Mean	SD	Mean	SD	Mean	SD	1.96 × SD	p	ICC	CImin	CImax	p
C2	28	0.54	0.33	0.50	0.27	0.04	0.14	0.28	.362	.882	.762	.943	<.001
C3	10	0.97	0.64	0.88	0.62	0.10	0.36	0.70	.285	.843	.509	.958	.001
C4	19	1.05	0.59	0.96	0.58	0.09	0.26	0.52	.165	.894	.749	.958	<.001
C5	22	1.05	0.53	1.03	0.49	0.02	0.21	0.42	.638	.915	.808	.964	<.001
C6	10	1.00	0.25	0.96	0.24	0.04	0.19	0.36	.559	.732	.235	.926	.006

Velocity encoding 3 cm/second
		Axial		Sagittal		Bland‐Altman coefficients				Intraclass correlation coefficients
Segment	N	Mean	SD	Mean	SD	Mean	SD	1.96 × SD	p	ICC	CImin	CImax	p
C2	34	0.47	0.22	0.46	0.24	0.01	0.09	0.17	.358	.931	.867	.965	<.001
C3	33	0.79	0.53	0.72	0.53	0.07	0.11	0.21	.001	.973	.914	.989	<.001
C4	32	0.70	0.34	0.93	0.51	–0.24	0.25	0.48	<.001	.734	.167	.899	<.001
C5	32	1.05	0.55	1.04	0.56	0.00	0.17	0.33	.921	.956	.912	.978	<.001
C6	31	0.86	0.51	0.85	0.45	0.01	0.23	0.45	.767	.887	.780	.944	<.001

Note: The motion amplitude values for the subgroups with venc 2 cm/second (upper table) and venc 3 cm/second (lower table) measurements are reported per cervical segment for axial and sagittal measurements. The amplitude difference of axial minus sagittal measurements was significantly different from 0 at segment C3 and C4 in the venc 3 cm/second subgroup. 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.