The Influence of Natural Head Position on the Cervical Sagittal Alignment

Table 2

The correlation analysis between parameters.

Variable		Curvature type	McGS	C0–C2 angle	C2–C5 angle	C5–C7 angle	C2–C7 angle	T1 slope	C0–C2 SVA	C2–C7 SVA	CG–C7 SVA
Curvature type	r	1	−0.11	0.38	−0.61	−0.33	−0.73	−0.40	0.42	0.06	0.27
			0.29	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	0.55	0.01
McGS	r		1	0.57	0.05	0.08	0.12	−0.05	−0.53	−0.28	−0.47
				<0.01	0.63	0.42	0.24	0.59	<0.01	<0.01	<0.01
C0–C2 angle	r			1	−0.51	−0.17	−0.53	−0.07	0.12	0.18	0.18
					<0.01	0.08	<0.01	0.46	0.24	0.07	0.07
C2–C5 angle	r				1	−0.12	0.69	0.29	−0.46	0.14	−0.16
						0.24	<0.01	<0.01	<0.01	0.15	0.11
C5–C7 angle	r					1	0.58	0.48	−0.22	−0.38	−0.37
							<0.01	<0.01	0.03	<0.01	<0.01
C2–C7 angle	r						1	0.55	−0.53	−0.15	−0.39
								<0.01	<0.01	0.13	<0.01
T1 slope	r							1	−0.05	0.28	0.13
									0.61	<0.01	0.21
C0–C2 SVA	r								1	0.39	0.79
										<0.01	<0.01
C2–C7 SVA	r									1	0.85
											<0.01
CG–C7 SVA	r										1

Note: bold font indicates statistical significance (). McGS: slope of McGregor’s line; SVA: sagittal vertical axis.