Table 2.

Association of risk variables with tonsillar herniation and cranial spinal angle.

Group		Tonsillar herniation		CSA
		r	P	r	P
Non-dysphagia	Age	-0.120	0.342	-0.083	0.490
	Sex	-0.036	0.775	0.082	0.499
	Disease duration	0.152	0.226	-0.012	0.924
Dysphagia	Age	-0.300	0.199	-0.427	0.053
	Sex	0.012	0.959	0.067	0.772
	Disease duration	-0.210	0.374	0.092	0.691

Abbreviations: CSA: cranial spinal angle. ∗P<0.05; ∗∗P<0.001.