4. Content Validity
All 40 patients completed the solid and semisolid food trails of VFSS. Due to severe aspiration for stopping liquid food trails, just 22 patients finished the liquid food trail. We discovered 14、4、1 and 21 patients corresponding with high to minimal risks of aspiration in solid food trails, whereas 18、2、7 and 13 patients in semisolid food trails. We also found 2、7、13 corresponding with moderate to minimal risks of aspiration in semisolid food trails, whereas 1、1、 13 and 7 patients corresponding with high to minimal risks of aspiration liquid food trails. Overall median scores of solid food (1; interquartile range, 1 to 5) were lower than those of semisolid food (2.5; interquartile range, 1 to 5), thus indicating a higher aspiration risk or more severe dysphagia with semisolid food (n=40, P<0.01). Overall median scores of semisolid food (1; interquartile range, 1 to 2) were lower than those of liquid food (2; interquartile range, 1 to 2), thus indicating a higher aspiration risk or more severe dysphagia with liquid food (n=22, P< 0.01).