Fig. 5From: Predictive ability of pharyngeal inlet angle for the occurrence of postoperative dysphagia after occipitocervical fusionScatter diagrams between dPIA and predictive radiographic parameters. dO-C2a and dC2-7a could lead to an increase in PIA. In addition, the increase in O-C2a (R2 = 0.546) had a superior correlation with the increase in PIA compared with the decrease in C2-7a (R2 = 0.189)Back to article page