Predictive ability of pharyngeal inlet angle for the occurrence of postoperative dysphagia after occipitocervical fusion

Table 3 Multivariate linear regression analysis for the influence of predictors on dnPAS%

	Unstandardized coefficient		Standardized coefficient	95% Confidence interval
Predictors for dnPAS%	B	SE	β	Lower limit	Upper limit	t value	p
dO-C2a	0.200	0.531	0.041	-0.854	1.254	0.376	0.708
dO-EAa	3.126	0.729	0.435	1.678	4.574	4.287	0.000*
dC2-7a	-0.256	0.325	-0.064	-0.902	0.390	-0.787	0.433
dPIA	1.358	0.613	0.285	0.141	2.574	2.216	0.029*
Constant	11.528	4.797		2.003	21.054	2.403	0.018*

dnPAS%, [postoperative narrowest oropharyngeal airway space (nPAS) - preoperative nPAS]/preoperative nPAS; dO-C2a, the difference between pre- and postoperative O-C2 angle; dO-EAa, the difference between pre- and postoperative occipital and external acoustic meatus to axis angle; dC2-7a, the difference between pre- and postoperative C2-7 angle; dPIA, the difference between pre- and postoperative pharyngeal inlet angleAdjust R²=0.501, p<0.001*, Indicates statistically significant differences (p<0.05)

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