Table 3.

Cervicomedullary angle (°) in the pain groups and significance of differences between the groups

Pain group (n)	Mean±SD	95% confidence interval	P
			Group 1	Group 2	Group 3	Group 4
Group 0 (n=40)	159.5±4.1	157.9–161.1	0.017	< 0.001	< 0.001	< 0.001
Group 1 (n=49)	155.7±5.2	154.4–157.4		0.017	< 0.001	< 0.001
Group 2 (n=59)	152.6±5.3	151.3–154.0			0.069	< 0.001
Group 3 (n=52)	149.7±5.7	148.1–151.4				0.026
Group 4 (n=45)	146.0±5.1	143.7–147.8

SD, standard deviation.